But without faith it is impossible to please Him, for he who comes to God must believe that He is, and that He is a rewarder of those who diligently seek Him. If you sit in a chair, you must admit to knowledge of the chair's existence and a belief that the chair will support your weight. Both of these persuasions may exist without actually sitting in the chair. Only by placing yourself in the chair do you show your trust of these other two concepts.
Faith then has three elements - knowledge, belief, and trust.
Or, if you prefer more modern terms, faith has intellectual, emotional, and volitional elements. The intellectual knowledge is a belief in the existence of God and the teaching of Scriptures. One may possess this knowledge at varying degrees of acceptance. This knowledge is gained by reading and hearing God's Word. So faith comes from hearing, and hearing by the word of Christ.