Faith and Evidences
During Jesus' three years ministry, He was showing evidences that He is God. The Greek word behind "faith" in the NT is pistis. As a noun, pistis is a word that was used as a technical rhetorical term for forensic proof. In the Book of Acts, Chapter 2, Peter appealed to the evidence of the wonders and signs performed by Jesus; he appealed to the empty tomb, and he appealed to fulfillment of OT prophecy. Peter's message were focused on evidences. The point is that Peter grounded belief in Christianity on evidence -- or, as the definition of "pistis" in Acts 17:31 would put it, proofs.
Acts 17:31
For he has set a day when he will judge the world with justice by the man he has appointed. He has given proof of this to all men by raising him from the dead."