Faith is self-belief or hope in a person, deity, thing, or in the doctrines or teachings of a religion or view. It can also be trust that is not based on evidence. The word faith is frequently used as an alternative for trust, hope or belief.
In religion, faith frequently engages accepting claims about the character of a deity, nature, or the universe. While some have disagreed that faith is against reason, proponents of faith
disagree that the proper domain of faith concerns questions which cannot be resolved by proof.
In other words, faith is strong certainty; firm trust in something for which there may be no concrete proof; complete hope in or devotion to. Faith is the reverse of doubt.