Matthew (ESV) 13 “Enter by the narrow gate. For the gate is wide and the way is easy[a] that leads to destruction, and those who enter by it are many. 14 For the gate is narrow and the way is hard that leads to life, and those who find it are few.
Faith is seeing light with your heart when all your eyes see is darkness! In the book, Arbeely tells Armhad that faith is believing in something even without proof, because you know it in your heart to be true.