7 And the LORD said unto Satan, Whence comest thou?
Then Satan answered the LORD, and said, From going to and fro in the earth, and from walking up and down in it.
8 And the LORD said unto Satan, Hast thou considered my servant Job, that there is none like him in the earth, a perfect and an upright man, one that feareth God, and escheweth evil?
9 Then Satan answered the LORD, and said, Doth Job fear God for nought? 1010 Hast not thou made an hedge about him, and about his house, and about all that he hath on every side? thou hast blessed the work of his hands, and his substance is increased in the land. 1111 But put forth thine hand now, and touch all that he hath, and he will curse thee to thy face.
12 And the LORD said unto Satan, Behold, all that he hath is in thy power; only upon himself put not forth thine hand.
So Satan went forth from the presence of the LORD.
-- Job 1:7-12 (KJV)
The "hedge" is clearly the protective hand of the LORD. Why would the existence of God's protective hand be an issue for Satan.? Surely, it can only be, that hitherto it has hitherto prevented him from doing what he is compelled in his heart to do: move others to want to curse the LORD to his face.
What should the LORD do, if life within the hedge becomes no different to what life would be without it, i.e. those within the hedge forget that it is there and imagine the blessings they enjoy are because of their own strength and their own goodness.? Well, he'd have to take it away to show them that such is not the case, wouldn't he?
6 Then answered the LORD unto Job out of the whirlwind, and said, ...
8 Wilt thou also disannul my judgment? wilt thou condemn me, that thou mayest be righteous?
...
1010 Deck thyself now with majesty and excellency; and array thyself with glory and beauty. 11 Cast abroad the rage of thy wrath: and behold every one that is proud, and abase him. 12 Look on every one that is proud, and bring him low; and tread down the wicked in their place. 13 Hide them in the dust together; and bind their faces in secret. 14 Then will I also confess unto thee that thine own right hand can save thee.
-- Job 40:6, 8, 10-14 (KJV)
###Conclusion###
"from the LORD" is an expression that one can excuse from those who had no access to the entire narrative of scripture, but there is no excuse for those who now do. Of course, the LORD takes full responsibility for the fact that evil exists, since if it was his will, he would have prevented it. However, however he is not the agent of destruction. Beings who have CHOSEN to oppose him, whose hearts are proud and defiant, and whose greatest desire is to usurp the reverence and honour that is due him, are such agents.
The evil spirit "from the LORD" spoken of in 1 Samuel 16:14, is the best the author could do to explain what he observed in regard to Saul. But as explained above, it is just another example of the LORD removing the hedge (his, his hand of protection), from those who have forgotten that it is not their own hand that savespreserves them, but the LORD's.