Calvin on Faith and Confidence

Faith produces confidence, which again, in its turn, produces boldness. There are three stages in our progress. First, we believe the promises of God; next, by relying on them, we obtain that confidence, which is accompanied by holiness and peace of mind; and, last of all, comes boldness, which enables us to banish fear, and to come with firmness and steadiness into the presence of God.
To separate faith from confidence would be an attempt to take away heat and light from the sun. I acknowledge, indeed, that, in proportion to the measure of faith, confidence is small in some and greater in others; but faith will never be found unaccompanied by these effects or fruits. A trembling, hesitating, doubting conscience, will always be a sure evidence of unbelief; but a firm, steady faith, will prove to be invincible against the gates of hell. To trust in Christ as Mediator, and to entertain a firm conviction of our heavenly Father’s love, — to venture boldly to promise to ourselves eternal life, and not to tremble at death or hell, — is, to use a common phrase, a holy presumption. (Commentary on Ephesians 3:12)