Substance
Now, Faith is the substance of things hoped for, the evidence of things not seen.
Hebrews 11:1
Substance is “hypo-stasis” in the Greek. Hypo meaning “beneath”, and stasis meaning “the state, status, or structure of a thing”. That is, the underlying, inherent nature of an object, its foundation, its unseen, non-physical yet spiritual essence. Whether it is an apple, a thought, or a person, to have faith in or for something is to have it for real, whether or not you see it manifested in the natural. For example, if you say, “I believe such and such will happen”, that is hope. If you have the substance of the thing hoped for, the very reality of that thing, though yet unseen, that is what Faith is.