Spurgeon begins this sermon on the subject of God’s sovereign election, aka predestination, by saying:

Do not imagine for an instant that I pretend to be able thoroughly to elucidate the great mysteries of predestination. There are some men who claim to know all about the matter. They twist it round their fingers as easily as if it were an everyday thing; but depend upon it, he who thinks he knows all about this mystery, knows but very little. It is but the shallowness of his mind that permits him to see the bottom of his knowledge; he who dives deep, finds that there is in the lowest depth to which he can attain a deeper depth still.

You can read the rest of this sermon by the Prince of Preachers here.