Christianity asserts that there is one source of Truth and that is the Bible, the inspired, inerrant Word of the living God, the only infallible rule of faith and practice (John 17:17; 2 Timothy 3:15-17; Hebrews 4:12).
Pinaninindigan ng Kristiyanismo na may iisa lamang pinagmumulan ng Katotohanan at ito ay ang Bibliya, ang kinasihan at walang pagkakamaling Salita ng Diyos, ang tanging pamantayan ng pananampalataya at mga gawa (Juan 17:17; 2 Timoteo 3:15-17; Hebreo 4:12).