"NOW FAITH is the assurance (the confirmation, the title deed) of the things [we] hope for, being the proof of things [we] do not see and the conviction of their reality [faith perceiving as real fact what is not revealed to the senses]" Hebrews 11:1 (Amplified).
Faith is not simply saying that what God says is true; true faith is acting on what God says because it is true. Faith is not so much in believing in spite of evidence, but obeying in spite of consequences.
(I wish I could give credit to who said this. It was a sermon note that my good friend, Rochelle, had written in her Bible, and she's forgotten who said it.)