O que é faith? O que é faith? Confident belief in the truth, value, or trustworthiness of a person, idea, or thing.Belief that does not rest on logical proof or material evidence. See Synonyms at belief, trust.Loyalty to a person or thing; allegiance: keeping faith with one's supporters. Christianity The theological virtue defined as secure belief in God and a trusting acceptance of God's will.The body of dogma of a religion: the Muslim faith. A set of principles or beliefs.in faith Indeed; truly.