Faith — pistis

Anchor

Now faith is the substance of things hoped for, the evidence of things not seen. Hebrews 11:1

For we walk by faith, not by sight. 2 Corinthians 5:7

Even so faith, if it hath not works, is dead, being alone. James 2:17

Strong's

• G4102 pistis — faith, belief, trust, reliance, fidelity
• G5287 hypostasis — substance, confidence, that which stands under
• G1650 elenchos — proof, evidence, conviction
• G3954 parrhēsia — bold confidence (faith's voice)

Faith as virtue vs faith as theorem

The math (T₅) says: if a claim is unverifiable but derivable from C > 0, then its probability is greater than zero. That is faith's logic. The virtue is the practice that goes with the logic: choosing to act on what you cannot yet see, because the math says the ground is there even when you do not yet see the ground.

2 Peter 1:5–7 puts faith first. You cannot add virtue to nothing. Every other rung on the ladder — temperance, patience, godliness, brotherly kindness, charity — assumes faith underneath. Faith is the floor.

Operation

Faith, as a daily operation, is:

1. Receive the proof of C > 0 (the foundation is real).
2. Act on what the foundation implies, before seeing the outcome.
3. Wait the way Hebrews 11:13 describes — "these all died in faith, not having received the promises, but having seen them afar off".
4. Work — James 2:17, faith without works is dead. The hands move even though the eyes have not yet seen the harvest.

Why faith is not credulity

Faith here is not "believe anything." The constraints (P₁–P₈) still apply. Faith fits in P₃'s space Uncertain: the claim is not yet verified, and it is not claimed verified. It is acted on because it is derivable from C, not because it feels true. Faith is the opposite of credulity — credulity acts without the proof; faith acts because of the proof that the unseen is load-bearing.

Prove all things; hold fast that which is good. 1 Thessalonians 5:21