1. Allegiance to duty or a person.
  2. Sincerity of intentions.
  3. Belief and trust in and loyalty to God, or something else.
  4. Firm belief in something for which there is no proof.
  5. Complete trust.
  6. Something that is believed especially with strong conviction.

Specifically, the emotion of Faith in relation to the future is found in the Spleen meridian in the Earth element.

Definition from Dictionary by Merriam-Webster.