And I, if I be lifted up from the earth, will draw all men unto Me. – John 12:32

If we follow Christ He will make us fishers of men by all our experience. I am sure that the man who is really consecrated to bless others will be helped in this by all that he feels, especially by his afflictions. I often feel very grateful to God that I have undergone fearful depression of spirits. I know the borders of despair, and the horrible brink of that gulf of darkness into which my feet have almost gone; but hundreds of times I have been able to give a helpful grip to brethren and sisters who have come into that same condition, which grip I could never have given if I had not known their deep despondency. So I believe that the darkest and most dreadful experience of a child of God will help him to be a fisher of men if he will but follow Christ. Keep close to your Lord and He will make every step a blessing to you. If God in providence should make you rich, He will fit you to speak to those ignorant and wicked rich who so much abound in this city, and so often are the cause of its worst sin. And if the Lord is pleased to let you be very poor you can go down and talk to those wicked and ignorant poor people who so often are the cause of sin in this city, and so greatly need the gospel. The winds of providence will waft you where you can fish for men. The wheels of providence are full of eyes, and all those eyes will look this way to help us to be winners of souls. You will often be surprised to find how God has been in a house that you visit: before you get there, His hand has been at work in its chambers. When you wish to speak to some particular individual, God’s providence has been dealing with that individual to make him ready for just that word which you could say, but which nobody else but you could say. Oh, be you following Christ, and you will find that He will, by every experience through which you are passing, make you fishers of men. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1906.cfm