“All these things” speaks of both the tribulation of the church and the events that happen at the presence/coming (parousia = presence) of the Son of man.
The third thing mentioned here in Matthew 24:3 is the end of the age (“world”) where the tribulation of the church finally comes to an end as “all these things” spoken by Jesus in Matthew 24 are fulfilled during this age.
Matthew 24:3 KJV (3) And as he sat upon the mount of Olives, the
disciples came unto him privately, saying, Tell us, when shall these
things be? and what shall be the sign of thy coming, and of the end of
This “generation” (by implication means “age”) is speaking of the “generation” of this evil age of tribulation which shall not pass away until all these things (the things related to the tribulation of the church and His presence) be fulfilled .
The end of this age (“world”) = this “generation” that shall not pass away until all these things be fulfilled.
Everything that Jesus speaks about in chapter 24 in relation to this age is “all these things” that are to be fulfilled during this generation or age.
The Son of man comes to open up the Scriptures to our understanding (when you shall “see”) and when we hear this interpretation of all these things, it shows us that He is near to us.
Know that He is near when we hear and understand all these things that have happened to the church.
Matthew 24:33-35 KJV (33) So likewise ye, when ye shall see all these
things, know that it is near, even at the doors.
When you shall “see”….that is, understand….these things, know that HE (not “it”) is near. The Son of man’s presence is near when we hear His eternal words that speak the understanding of “all these things”.
“When you shall see all these things”…that is, to understand/know these things….”know that Jesus (He) is near, even at the doors”.
The Lord knocks upon our doors with His voice and we are to let Him in by the receiving of His words of life and spirit. We are to hear and believe and receive His words of the heavenly understanding of the Scriptures.
But some will hear and not believe and will continue on as business as usual….behaving with contentions, unbelief, envy, strife, wrath, etc., as they stay in their church divisions where this will be “acceptable” behavior towards the hearing of the Word of God spoken in truth and sincerity. They will not receive the Word of Truth but continue with the word of men and their private interpretations of the Scriptures. The “old” interpretations will seem better as they will reject the "new".
When you shall see these things = when you shall understand these things.
Know that it is near = know that He (the Son of man) is near.
This is part of the answer to the disciples question about the sign of the presence (coming) of the Son of man. “What is the sign of your presence”? We shall know that He is near when He gives us understanding of all these things.
Know that He is near when we hear HIs voice opening up the Scriptures to our understanding. The other part is the sign of the Son of man within our darkened hearts as the Light shines as the lightning (the bright and morning star, the sun) comes from the east and shines to the west when we hear His voice opening up the Scriptures. Hearing His voice has a personal effect upon our own hearts.
(Luke 24:32 And they said one to another, Did not our heart burn within us, while he talked with us by the way, and while he opened to us the scriptures?)
The sign of the end of the age (the end of this “generation”)is that all of these things that Jesus spoke to us ahead of time will be fulfilled….up to and including the gospel of the kingdom being preached in all the world for a witness unto all nations.
Matthew 24: (34) Verily I say unto you, This generation shall not
pass, till all these things be fulfilled. (35) Heaven and earth shall
pass away, but my words shall not pass away.
Again, “all these things” also refers to the tribulation that the church was and is to endure in this age as not one stone has been left upon another as the false Christs and false prophets have come forth and have separated the church into divisions where there is envy and strife and hatred of one another rather than being built upon each other as living stones.
Matthew 24:1-2 KJV (1) And Jesus went out, and departed from the
temple: and his disciples came to him for to shew him the buildings of
the temple. (2) And Jesus said unto them, See ye not all these
things? verily I say unto you, There shall not be left here one stone
upon another, that shall not be thrown down.
The false Christs and false prophets have thrown us all down (as the stones are not left one upon another) in their tribulation of His body….the “spiritual house”….the temple of His body. It has been and still is a time of tribulation we are currently living in.
1 Peter 2:5 KJV (5) Ye also, as lively stones, are built up a
spiritual house, an holy priesthood, to offer up spiritual sacrifices,
acceptable to God by Jesus Christ.