Jesus loved using analogies for the Kingdom and what is required to enter. Right before sharing the Parable of the fig tree he was speaking first about how sin leads to death and repentance leads to life. What was He trying to tell them? Living a life in sin equals death but living in and for God equals life.
And he told this parable: “A man had a fig tree planted in his vineyard, and he came seeking fruit on it and found none. And he said to the vinedresser, ‘Look, for three years now I have come seeking fruit on this fig tree, and I find none. Cut it down. Why should it use up the ground?’ And he answered him, ‘Sir, let it alone this year also, until I dig around it and put on manure. Then if it should bear fruit next year, well and good; but if not, you can cut it down.’” Luke 13:6-9
This man had a fig tree planted among vines. It was a lonely fig tree and was not bearing fruit because the grapes were taking most of the nutrients needed for the fig tree to flower and give fruit. Maybe the tree was not mature enough to do what it is supposed to do. Maybe it was seeking nutrients but could not find them.
The fig tree is representing a sinner who knows of God in a sea of sinners who refuse, due to their love of the world. The corruption of man and the perversion of the Word has people confused so they cannot truly bear fruit. The man sees the tree and wants it destroyed. The devil will take you down if you stay in your ways. Repenting and replenishing the nutrients with the truth will bring forth life which is what the vinedresser tells the man.
But the vinedresser cares for the tree, gives it the nourishment needed and it will bear fruit as it sees it is different what the fruit is picked it will share with others and possibly plant seeds as well. Jesus is sharing the Word (nourishment) so that our spirit is fed and we can bear the fruit (repent) and share our faith with others.
Jesus is telling those who were around Him that they must receive the Word as it is meant to be heard and repent of their sins so that they will not die the final death but have eternal life. Now He gave it a time period which is saying that the time we have on this earth is short and we need to stay in the Word to make it through and bear fruit for we will surely be cut down if we continue in our sinful ways.
Bottom line is this. Repent of our sins and trust in God that He will continue to nourish us through His Word. We must stay in His Word so that we can bear fruit through its sharing because if we do not, we will be cut down and suffer death never to see the light of God again.