Expressions like "have faith, everything will be fine" are commonly used to support or reassure those who face difficult problems or distressing situations, but how is the concept of faith in the Bible described? Does having faith really work?

In the New Testament, the word "faith" comes from the Greek pistis. According to New Strong's Expanded Dictionary of Bible Words, "the term pistis denotes a belief determined by predominant trust (or security), whether in God or in Jesus Christ, which arises from faith in them. . 'Faith' means confidence, security, certainty, and conviction "(p 1315).