His impression of her was favorable. What are your feelings about the crisis?. It strengthened my belief in his sincerity. I had a feeling that she was lying.
source: WordNet 3.0
Assent to a proposition or affirmation, or the acceptance of a fact, opinion, or assertion as real or true, without immediate personal knowledge; reliance upon word or testimony; partial or full assurance without positive knowledge or absolute certainty; persuasion; conviction; confidence; as, belief of a witness; the belief of our senses.