Proof that a prophet is true happens in that point in time that the events foretold actually take place. Jesus tells us to believe in the OT prophets. God did give them visions of what will happen. The difficulty understanding many messages is they are told in parables, metaphor and symbolism. People that want to believe they are literal will never understand the message. It is challenging to understand the meaning. Like, blood, flesh, wine and bread can all mean doctrine. It is clear that Israel represents both the fig tree and the olive tree. So that is 2 parts of Israel, the government/military is the olive and the religion is the fig. Jesus is the vine and Christianity is the vine tree because it has branched off into so many different beliefs.
Matthew 21:19
And when he saw a fig tree in the way, he came to it, and found nothing thereon, but leaves only, and said unto it, Let no fruit grow on thee henceforward for ever. And presently the fig tree withered away."
Jesus loves the people of Israel, but their religion is not correct, has no fruit. Jesus came to remove belief in their religion by teaching truth and sought to lead people completely away from that religion into a new religion accepted by God for their survival so their old beliefs would cease to exist, wither away. As mentioned, God did warn Israel of their future by prophets, and we are to listen to them. Israel would kill their prophets because they did not want to believe what they said is true.
Clues to meaning are offered, as a nation is called both a mountain and a tree. Foothill is the military that people must pass over to reach the people at the top of the mountain/nation in control of the government. So when a scripture states trees are talking, that is not literal, it means heads of nations are talking with each other. When a forest is marching that means nations have joined together to fight a war.
Jeremiah states,
3::
23 Truly in vain is salvation hoped for from the hills, and from the multitude of mountains: truly in the LORD our God is the salvation of Israel." hills= militaries hope they will prevail in battle and multitude of mountains may mean a world war involving Israel.
The prophet Isaiah in chapter 17:1
The burden of Damascus. Behold, Damascus is taken away from being a city, and it shall be a ruinous heap." Damascus [ Syria ], nearly 500,000 people have been killed in the decade-long civil war in Syria since the Syria revolution on March 15, 2011, informed the Syria Observatory for Human Rights (SOHR). Control of Damascus has been fought over for a decade and many buildings that have not been bombed, stand empty because the occupants fled war. It is ruined because there is no peace.
Jeremiah also warns of this current war in 49:24 "
Damascus is waxed feeble, and turneth herself to flee, and fear hath seized on her: anguish and sorrows have taken her, as a woman in travail." Like a woman in travail represents an uncertain future for the children of Syria.
Jeremiah 4:18
Thy way and thy doings have procured these things unto thee; this is thy wickedness, because it is bitter, because it reacheth unto thine heart."
Bitter= wickedness that people desire to do and choose to do even though it is wrong
Revelation 10:10
And I took the little book out of the angel's hand, and ate it up; and it was in my mouth sweet as honey: and as soon as I had eaten it, my belly was bitter."
The little book is knowledge of the future which is sweet because people want to know what will happen before it does and they desire/expect a happy future. But once taken in and understood, knowledge of the evil desires for war in the world and the final results makes one sick to their stomach.