pistis, n.All

Pistis (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠trustful loyalty to the law of one's own being, not faith — the attitude a religious man should have toward God.