When Jesus walked the earth physically He was God in the flesh. Jesus had power to forgive sin as well as heal the sick. Jesus could walk on water, turn the water into wine, or even rebuke the winds and calm the storms by saying, "Peace be still".
Mark 4:37-41... And there arose a great storm of wind, and the waves beat into the ship, so that it was now full. And he was in the hinder part of the ship, asleep on a pillow: and they awake him, and say unto him, Master, carest thou not that we perish? And he arose, and rebuked the wind, and said unto the sea, Peace, be still. And the wind ceased, and there was a great calm. And he said unto them, Why are ye so fearful? how is it that ye have no faith? And they feared exceedingly, and said one to another, What manner of man is this, that even the wind and the sea obey him?
Jesus had dominion over every tangible thing on Earth. Jesus had power over the laws of nature. Jesus delegated power to His disciples. Jesus as God in the flesh could literally "wither or curse" the fig tree. Jesus spoke Judgment on the fig tree.
Matt 21:19-20...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. And when the disciples saw it, they marvelled, saying, How soon is the fig tree withered away!
This pronunciation of Divine Judgment on the fig tree also pointed to the Divine Judgment that would come upon Israel for rejecting the Messiah and the Kingdom on earth offered to Israel for three and on half years. Jesus as God in the flesh had power to literally wither a fig tree...but there was much, much more behind this curse pertaining to Israel.
Jesus "reproved" Israel for their doubt and rejection. Jesus "exposed" the sin of the Pharisees when He went into the Temple grieved in His heart that Israel "rejected" the Kingdom that God offered to restore in Jersalem. Jesus thus pronounced Judgment on the Temple. Jesus "spoke" Judgment that happened in 70AD.
Matt 23:39-24:2...For I say unto you, Ye shall not see me henceforth, till ye shall say, Blessed is he that cometh in the name of the Lord. And Jesus went out, and departed from the temple: and his disciples came to him for to shew him the buildings of the temple. 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.
This was Jesus foretelling (speaking) the destruction of Temple that actually took place in 70AD. 800, 000 Jews were slaughtered and the Roman government took years to tear down the stones and destroy the Jewish Temple in Jerusalem. This annihilation was simply the aftermath of Jesus' pronunciation of Judgment on Israel when He cursed the fig tree. After the Jewish Temple's destruction...by the Roman government... for centuries the Jews were scattered and persecuted throughout Europe. The Roman Church dominated the European countries in the name of "Spiritual Israel". If scattered Jews would not accept " water baptism" in the name of Christ they were murdered or imprisoned by the Roman Church. This "inquisition" or opposition against Israel went on for 12-14 centuries. Jews that would not comply to the common doctrine of "Spiritual Israel" were killed and annihilated under Roman dominion for centuries. This was the ongoing ripple effect of Jesus' pronunciation of Judgment on Israel for rejecting their promised Messiah. Destruction and misery did not end and the destruction of the Temple in 70 AD or the Inquisition for 12-14 centuries, it continued in the Holocaust under the reign of Hitler where millions of Jews were slaughtered because antisemitism. This curse continues now in the Israeli Arab conflict, and will continue throughout this Church Age until the curtain comes down "after the Rapture of the Church" and "after the seven year Jewish Tribulation". Israel will then "accept Christ as the promised Messiah" and the Earthly Kingdom will be established.
Isa 9:7...Of the increase of his government and peace there shall be no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even for ever.
Jesus spoke Judgment on the fig tree when he said...Let no fruit grow on thee henceforward. No fruit has grown in Israel since that day. This curse that Jesus pronounced upon Israel will not be lifted from Israel until they say as a nation...Blessed is he that cometh in the name of the Lord.
Matt 23:39..For I say unto you, Ye shall not see me henceforth, till ye shall say, Blessed is he that cometh in the name of the Lord.
This will not happen until the end of the Great Tribulation when Christ returns with His bride and sets up the promised Kingdom on Earth (that was rejected during His Earthly ministry). Jesus began His ministry offering the Kingdom of Heaven. John the Baptist preached the Kingdom of Heaven was at hand. The twelve disciples were sent out by Christ to preach the Kingdom of Heaven was at hand. Jesus even ordained the 70 and sent them out two by two to preach the Kingdom of Heaven was at hand. This all took place in three and one half years after Christ was 30 years of age when baptized of John. The Kingdom of Heaven message was commanded by Christ to be preached ...not to the Gentiles or Samartians...but only to the lost sheep of Israel!
Matt 10:5-7...These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into any city of the Samaritans enter ye not: But go rather to the lost sheep of the house of Israel. And as ye go, preach, saying, The kingdom of heaven is at hand.
When all the curse that Jesus pronounced upon the nation of Israel transpires (all of Isreal will accept the King...the Kingdom will be restored)...at the end of the Great Tribulation Christ in flaming fire and in Divine Judgment will then speak the following words...
Matt 25:34...Then shall the King say unto them on his right hand, Come, ye blessed of my Father, inherit the kingdom prepared for you from the foundation of the world:
This pronunciation of Judgment happened to Israel when Jesus withered the fig tree. When Jesus spoke things happened! Glory!
P.S. All this is written to say one thing. Don't mix up the Bible as mixing it up brings confusion. Confusion can bring a frustrated faith down the road. Let God be your teacher! Mixing up the Kingdom Message that Christ preached to Israel...with the Gospel message preached to both Jew and Gentile in the Church today can become a confusing matter. Examine the Scriptures. Rightly divide God's Word. Put the Bible in its proper context. The Lord blesses! Love you all!