Faith can be defined as “the confident belief or trust in the truth or trustworthiness of a person, idea, or thing….not resting on logical proof or material evidence”.
Read that again. Not resting on logical proof or material evidence. If we had evidence, there would be no need for faith. Yet Paul (I think…) proclaims in Corinthians 14 that faith is one of the most important virtues one can possess. With evidence, it is unnecessary.
Therefore, when Jesus says “For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life”, John 3 v. 16) , He commands that we have faith in him. He is not asking us to look for evidence consistent with his existence. He is asking us to trust that what He did on the Cross was what He said it was – without having the evidence in front of us.