While the bridegroom tarried, they all slumbered and slept. – Matthew 25:5

Alas! on a hot and drowsy day, when everything has fallen into a deep slumber, even God’s saints, though they be wise virgins, go as soundly asleep as the foolish virgins, and they forget that “the Bridegroom cometh.” “While the Bridegroom tarried, they all slumbered and slept;” and, sometimes, you and I must catch ourselves nodding when we ought to be wide awake. We are going through a part of that enchanted ground which John Bunyan describes, and we do not know what to do to keep ourselves awake.

At such times, a Christian is very apt to ask, “Am I indeed planted in God’s garden? Am I really a child of God?” Now, I will say what some of you may think a strong thing; but I do not believe that he is a child of God who never raised that question. I have sung, and I expect that I may have to sing again, –

“‘Tis a point I long to know;
Oft it causes anxious thought;
Do I love the Lord or no?
Am I His, or am I not?”

I cannot bear to get into that condition, and I cannot bear to keep in it when I am in it, but still, there must be anxious thought about this all-important matter. Because you happened to be excited on a certain occasion, and thought you were converted and were sure of heaven, you had better look well to the evidence on which you are relying. You may be mistaken after all; and while I would not preach up little faith, I would preach down great presumption. No man can have a faith too strong, and no assurance can be too full, if it comes really from God the Holy Spirit. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2475.cfm