As for me, I shall behold Your face in righteousness; when I awake, I shall be satisfied with Your likeness. – Psalm 17:15

“I will behold Thy face in righteousness; I shall be satisfied when I awake up in Thy likeness.” If some men should say so now, they would be called fanatics, and it would be considered presumption for any man to say, “I will behold Thy face, I shall be satisfied;” and I think there are many now in this world who think it is quite impossible for a man to say to a certainty, “I know, I am sure, I am certain.” But, beloved, there are not one or two, but there are thousands and thousands of God’s people alive in this world who can say with an assured confidence, no more doubting of it than of their very existence, “I will behold Thy face in righteousness. I shall be satisfied, when I awake in Thy likeness.” It is possible, though perhaps not very easy, to attain to that high and eminent position wherein we can say no longer do I hope, but I know; no longer do I trust, but I am persuaded; I have a happy confidence; I am sure of it; I an certain; for God has so manifested Himself to me that now it is no longer “if” and “perhaps” but it is positive, eternal, “shall.” “I shall be satisfied when I awake in Thy likeness.”

Oh! if ye are talking like that, ye must expect to have trouble, for God never gives strong faith without fiery trial; He will never give a man the power to say that “shall” without trying him; He will not build a strong ship without subjecting it to very mighty storms; He will not make you a mighty warrior, if He does not intend to try your skill in battle. God’s swords must be used; the old Toledo blades of heaven must be smitten against the armor of the evil one, and yet they shall not break, for they are of true Jerusalem metal, which shall never snap. Oh! what a happy thing to have that faith to say “I shall.” Some of you think it quite impossible, I know; but it “is the gift of God,” and whosoever asks it shall obtain it: and the very chief of sinners now present in this place may yet be able to say long before he comes to die, “I shall behold Thy face in righteousness.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0025.cfm