How does the Bible speak to a healthy self-confidence?

Romans 12:3Because of the privilege and authority God has given me, I give each of you this warning: Don’t think you are better than you really are. Be honest in your evaluation of yourselves, measuring yourselves by the faith God has given us.

Philippians 1:6I am certain that God, who began the good work within you, will continue his work until it is finally finished on the day when Christ Jesus returns.

Philippians 2:24I have confidence from the Lord that I myself will come to see you soon.

Colossians 2:2I want them to be encouraged and knit together by strong ties of love. I want them to have complete confidence that they understand God’s mysterious plan, which is Christ himself.

1 Thessalonians 5:8Let us who live in the light be clearheaded, protected by the armor of faith and love, and wearing as our helmet the confidence of our salvation.

Hebrews 4:16So let us come boldly to the throne of our gracious God. There we will receive his mercy, and we will find grace to help us when we need it most.

Hebrews 11:1Faith shows the reality of what we hope for; it is the evidence of things we cannot see.