Say I these things as a man? or saith not the law the same also? For it is written in the law of Moses, Thou shalt not muzzle the mouth of the ox that treadeth out the corn. Doth God take care for oxen? Or saith he it altogether for our sakes? For our sakes, no doubt, this is written: that he that ploweth should plow in hope; and that he that thresheth in hope should be partaker of his hope. If we have sown unto you spiritual things, is it a great thing if we shall reap your carnal things? If others be partakers of this power over you, are not we rather? Nevertheless we have not used this power; but suffer all things, lest we should hinder the gospel of Christ. Do ye not know that they which minister about holy things live of the things of the temple? and they which wait at the altar are partakers with the altar? Even so hath the Lord ordained that they which preach the gospel should live of the gospel. (1 Corinthians 9:8-14)
Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees. And they reasoned among themselves, saying, It is because we have taken no bread. Which when Jesus perceived, he said unto them, O ye of little faith, why reason ye among yourselves, because ye have brought no bread? Do ye not yet understand, neither remember the five loaves of the five thousand, and how many baskets ye took up? Neither the seven loaves of the four thousand, and how many baskets ye took up? How is it that ye do not understand that I spake it not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees? Then understood they how that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees. (Matthew 16:6-12)
And he said unto them, He that hath ears to hear, let him hear. And when he was alone, they that were about him with the twelve asked of him the parable. And he said unto them, Unto you it is given to know the mystery of the kingdom of God: but unto them that are without, all these things are done in parables: That seeing they may see, and not perceive; and hearing they may hear, and not understand; lest at any time they should be converted, and their sins should be forgiven them. And he said unto them, Know ye not this parable? and how then will ye know all parables. (Mark 4:9-13)
All these things spake Jesus unto the multitude in parables; and without a parable spake he not unto them. (Matthew 13:34)
From these passages, we know that Jesus used parables. However, these parables do not always seem to be parables, as Jesus and Paul have shown. This demonstrates that God does not have to explicitly say that something is a parable for it to be a parable.
Jesus is the Word that became flesh, and the Bible is also God's word. Jesus always spoke in parables, and therefore, the entire Bible is written in parables–hence many people and events written therein foreshadow Jesus, and laws regarding animals.
'Jesus always spoke in parables' does not mean He was telling a story every time He uttered a word, but rather, He was secretly referring to something from the Old or New Testament and also giving clues on how to understand the Bible.
The "gates of hell" are not to be understood literally. There are multiple ways to interpret this phrase, but they all should lead to those who are 'unsaved'.
And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. (Matthew 16:18)
Does not this sound familiar? A rock? Prevailing?
Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock: And the rain descended, and the floods came, and the winds blew, and beat upon that house; and it fell not: for it was founded upon a rock. (Matthew 7:24-25)
The word prevail was not used in this passage, but it carries the same idea as making the foolish man's house fall. And where do the waters and the wind come from?
In the six hundredth year of Noah's life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened. (Genesis 7:11)
And God remembered Noah, and every living thing, and all the cattle that was with him in the ark: and God made a wind to pass over the earth, and the waters asswaged; The fountains also of the deep and the windows of heaven were stopped, and the rain from heaven was restrained; (Genesis 8:1-2)
The flood came from the deep, and hell that what hell is often referred to. The fountains and windows can be seen as gates. So, what are waters?
They came round about me daily like water; they compassed me about together. (Psalm 88:17)
There are a dozen verses that refer to the unsaved as deep water. See Jonah chapter 2. Incidentally, Jonah was a type of Christ in the moment when he was in the whale (or whatever he was swallowed by) and Jesus being tried by Pilate and Herod and mocked was foreshadowed by the "pains", "waters", "dogs", and "bulls" mentioned in Psalms and Jonah.
And, behold, the veil of the temple was rent in twain from the top to the bottom; and the earth did quake, and the rocks rent; (Matthew 27:51)
And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. (Acts 2:2)
Sound familiar? The rocks being rent and the mighty wind are synonymous with the fountains of the deep being broken up and the wind taking the water away. Elijah, too, had a similar ordeal happen (wind, fire, earthquake) and is a type of Christ. Incidentally, both Elijah and Jonah asked for death and did not want to go on with the mission, which supports that these three men can help us understand the gates of hell.
Lift up your heads, O ye gates; and be ye lift up, ye everlasting doors; and the King of glory shall come in. (Psalm 24:7)
Praise ye the LORD. Praise ye the LORD from the heavens: praise him in the heights. Praise ye him, all his angels: praise ye him, all his hosts. Praise ye him, sun and moon: praise him, all ye stars of light. Praise him, ye heavens of heavens, and ye waters that be above the heavens. Let them praise the name of the LORD: for he commanded, and they were created. He hath also stablished them for ever and ever: he hath made a decree which shall not pass. Praise the LORD from the earth, ye dragons, and all deeps: Fire, and hail; snow, and vapour; stormy wind fulfilling his word: Mountains, and all hills; fruitful trees, and all cedars: Beasts, and all cattle; creeping things, and flying fowl: Kings of the earth, and all people; princes, and all judges of the earth: Both young men, and maidens; old men, and children: Let them praise the name of the LORD: for his name alone is excellent; his glory is above the earth and heaven. He also exalteth the horn of his people, the praise of all his saints; even of the children of Israel, a people near unto him. Praise ye the LORD. (Psalms 148:1-14)
And he dreamed yet another dream, and told it his brethren, and said, Behold, I have dreamed a dream more; and, behold, the sun and the moon and the eleven stars made obeisance to me. And he told it to his father, and to his brethren: and his father rebuked him, and said unto him, What is this dream that thou hast dreamed? Shall I and thy mother and thy brethren indeed come to bow down ourselves to thee to the earth? (Genesis 37:9-10)
Gates in general refer to people. God often uses natural objects in place of people, especially in Psalms. Joseph's dream supports, at the least, His use of celestial objects to represent people.
My son, if sinners entice thee, consent thou not. If they say, Come with us, let us lay wait for blood, let us lurk privily for the innocent without cause: Let us swallow them up alive as the grave; and whole, as those that go down into the pit: We shall find all precious substance, we shall fill our houses with spoil: Cast in thy lot among us; let us all have one purse: My son, walk not thou in the way with them; refrain thy foot from their path: For their feet run to evil, and make haste to shed blood. Surely in vain the net is spread in the sight of any bird. And they lay wait for their own blood; they lurk privily for their own lives. So are the ways of every one that is greedy of gain; which taketh away the life of the owners thereof (Proverbs 1:10-19)
Her house is the way to hell, going down to the chambers of death. (Proverbs 7:27)
And thou shalt write them upon the posts of thy house, and on thy gates. (Deuteronomy 6:9)
For the grave cannot praise thee, death can not celebrate thee: they that go down into the pit cannot hope for thy truth (Isaiah 38:18)
This is just one of several verses that speak of the immoral and strange woman. This woman represents the unsaved. Houses and gates are associated with each other; you can replace "house" with "gates". The fact that her gates lead to hell is the very apparent reason why the phrase is "gates of Hades". The reason why the unsaved are referred to this is because they can take people to Hades. Having such people in your company and taking part in their wicked acts will make you as they are--hellbound. They also get that name from the fact that hell is not just literal, but also spiritual-- a state of being. So: "gates" because they can sweep you away; "Hades" because that is who they are.
And Samson lay till midnight, and arose at midnight, and took the doors of the gate of the city, and the two posts, and went away with them, bar and all, and put them upon his shoulders, and carried them up to the top of an hill that is before Hebron. (Judges 16:3)
What man of you, having an hundred sheep, if he lose one of them, doth not leave the ninety and nine in the wilderness, and go after that which is lost, until he find it? And when he hath found it, he layeth it on his shoulders, rejoicing. (Luke 15:4-5)
Then said Jesus unto them again, Verily, verily, I say unto you, I am the door of the sheep. All that ever came before me are thieves and robbers: but the sheep did not hear them. I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture. (John 10:7-9)
Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat: (Matthew 7:13)
This is just more evidence of gates (posts and doors, too) being used to represent people.