Another picture that we have which is part of the symbolism of Christ on the cross is that darkness came upon the world in the middle of the day. Things on Earth are patterned after things in the heavens.
Faith = Evidence
You don't need to have faith in something if you can see it. Faith is needed when we can't see. However, that has nothing to do with evidence. As such, faith is believing in what you can't see because of evidence.
Current popular science (SciPop) propaganda is that "faith is belief without evidence." However we all have the same evidence (Matty's razor) so the meme fails as a definition of faith.