Minds confident and at rest come from knowing the truth.
Colossians 2:2-4
2-4 I want you woven into a tapestry of love, in touch with everything there is to know of God. Then you will have minds confident and at rest, focused on Christ, God’s great mystery. All the richest treasures of wisdom and knowledge are embedded in that mystery and nowhere else. And we’ve been shown the mystery! I’m telling you this because I don’t want anyone leading you off on some wild-goose chase, after other so-called mysteries, or “the Secret.”
1 Timothy 2:3-4
3 For this is good and acceptable in the sight of God our Savior, 4 who desires all men to be saved and to come to the knowledge of the truth.