God said, “Let there be light”; and there was light. — Genesis 1:3
This is the reason that the bible says God cannot lie: when he speaks, what he spoke becomes true. He defines truth by his words. It is impossible for something the Lord puts into voice to not come into existence.
So let me tell you some of what God says:
You are altogether beautiful, my darling; there is no flaw in you. –Song 4:7
You are strong. The word of God lives in you. You have overcome the evil one. — 1 John 2:14
You are precious. You are honored and I love you. –Isaiah 43:4
Never forget it. Never forget that God defines truth. God makes truth. When a word comes out from God, reality bends and reshapes until that word is a settled fact.
We can believe some depressing things about ourselves. But God doesn’t.