There is a stone that always lets everybody stunned before Lord Jesus, who cursed the Fig Tree. Mark 11:12-14 reads: "On the following day, when they came from Bethany, he was hungry. Seeing in the distance a fig tree in leaf, he went to see whether perhaps he would find anything on it. When he came to it, he found nothing but leaves, for it was not the season for figs. He said to it, ‘May no one ever eat fruit from you again.’ And his disciples heard it". Everybody, including maybe you and me, should surely doubt on His curse; to which, for what or whom, and why then?
That curse event occurred just after His enter into Jerusalem, that led His Passion and Resurrection. And, the famous cleansing the Temple happened. To which did He curse? It is surely the fig tree that He cursed. For what He cursed the fig tree? He would like to show His magnificent to the disciples and us. Why did he then curse the tree? Because He would show a hidden meanings in His preaches. The following comes out of my personal understanding of the passage, though it does never show the Church's interpretations on it.
The fig tree is sinful to its Creator, Lord Jesus, because it has only leaf without any fruits, though God approaches it. Look back to Genesis 3:11-14; Adam and Eva were created by Him and betrayed Him; They "hid from Him among the trees", "because they were naked." At the time of Jesus entering Jerusalem, it has come that all creatures should be saved from the evil one. The fig tree had not prepared for His enter or visit.
On the contrary to the fig tree, go back before the event and take a look at Luke 19:1-9, that shows how Zacchaeus was cleansed by Him: "He entered Jericho and was passing through it. A man was there named Zacchaeus; he was a chief tax-collector and was rich. He was trying to see who Jesus was, .. climbed a sycomore tree to see him, because he was going to pass that way. when Jesus came to the place, he looked up and said to him, ‘Zacchaeus, hurry and come down; for I must stay at your house today.’ So he hurried down and was happy to welcome him. All who saw it began to grumble and said, ‘He has gone to be the guest of one who is a sinner.’ Zacchaeus stood there and said to the Lord, ‘Look, half of my possessions, Lord, I will give to the poor; and if I have defrauded anyone of anything, I will pay back four times as much.’ Then Jesus said to him, ‘Today salvation has come to this house, because he too is a son of Abraham. For the Son of Man came to seek out and to save the lost.’"
Zacchaeus had been willing to approach God from his side; Lord Jesus Himself approached the Fig Tree. Even without any will to change his or her heart, Lord Jesus will cleanse and pardon whoever is willing to approach Him as He manifested Himself onto Zacchaeus. But, the fig tree or somebody like the tree never have fruits for His grace or even approached Him. Lord Jesus showed His apostles and us that the time or the season comes like a thief and be prepared for the time. All we are sinful and would not like to work for His Heaven as He expects us to do so. His mercy on us was shown there as the lesson from the withered fig tree. Jesus simply answered St. Peter, ‘Have faith in God. ... So I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours.‘Whenever you stand praying, forgive, if you have anything against anyone; so that your Father in heaven may also forgive you your trespasses.’ When we follow His commands herein, we are to be saved from the doom of the fig tree. Just pray for having faith in God through our Lord Jesus.