He found nothing but leaves, for it was not the season for figs. In response Jesus said to it, “Let no one eat fruit from you ever again.” Now in the morning, as they passed by, they saw the fig tree dried up from the roots. – Mark 11:13,14,20

I have seen the fair professor undergo a blight. He has looked like a thing that has felt the breath of a furnace and has had its moisture dried up. The man is no longer himself: his glory and his beauty are hopelessly gone. No axe was lifted; no fire was kindled; a word did it, and the tree withered from the root. So, without thunderbolt or pestilence, the once brave professor is stricken as with the judgment of Cain. It is an awful fate. Better far to have the vinedresser come to you with the axe in his hand, and strike you with the head of it, and say to you, “Tree, thou must bear fruit, or be hewn down.” Such a warning would be terrible, but it would be infinitely better than to be left in one’s place untouched, quietly to wither to destruction.

Let no man say, “This is very hard.” Brother, it is not hard, is it, that if we profess a thing, we should be expected to be true to it? Besides, I pray you not to think that anything my Lord can do is hard…He is all love and tenderness: He does not want to wither you, nor will He, if you be but true. The very least He may expect is that you be true to what you profess…Come and bow humbly at His feet, and say, “Lord, if anything in this solemn truth bears upon me, I beseech Thee so to apply it to my conscience that I may feel its power and flee to Thee for salvation.” Many men are converted in this way-these hard but honest things drive them from false refuges and brings them to be true to Christ and to their own souls. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2107.cfm