Faith means being sure of the things we hope for and knowing that something is real even if we do not see it
Hebrews 11:1
Faith is trusting what the eye can't see. Eyes see the prowling lion. Faith sees Daniel's angel. Eyes see storms. Faith sees Noah's rainbow...
Your eyes look in the mirror and see a sinner, a failure, a promise-breaker. But by faith you look in the mirror and see a robed prodigal bearing the ring of grace on your finger and the kiss of your Father on your face.
Max Lucado from "When God Whispers Your Name"