For God so loved the world, that he gave his one and only Son, that whoever believes in him should not perish, but have eternal life.
That whosoever believeth on him ...  Faith is the great principle of Christianity, motivating every act of obedience, securing the believer in times of bewilderment or temptation, sustaining the disciple through tribulations and distress, and enlightening the soul during every darkness. Faith is the first of the preconditions of redemption in Christ Jesus, and it is also the last, there never being a single moment of the Christian pilgrimage when faith is not required.  Without faith it is impossible to please God  (Hebrews 11:6).  "On him ..." is alleged to be one of the words that is Johannine rather than from Christ, but such a conceit is rejected. Glorious as faith assuredly is, it is faith "in Christ" that saves, not faith "in faith."