'Confidence' in the Bible

‘Look, you mockers, and marvel, and perish and vanish away;For I am doing a work in your days,A work which you will never believe, even if someone describes it to you [telling you about it in detail].’”

After a long debate, Peter got up and said to them, “Brothers, you know that in the early days God made a choice among you, that by my mouth the Gentiles would hear the message of the gospel and believe.

But I confess this to you, that according to the Way, which they call a [divisive and heretical] sect, I do worship and serve the God of our fathers, [confidently] believing everything that is in accordance with the Law [of Moses] and that is written in the Prophets;

For [your majesty] the king understands these things, and [therefore] I am also speaking to him with confidence and boldness, since I am convinced that none of these things escape his notice; for this has not been done in a corner [hidden from view, in secret].

So keep up your courage, men, for I believe God and have complete confidence in Him that it will turn out exactly as I have been told;