To this extent, it is quite correct to say that belief or faith is the element of all certainty

Johann Gottlieb Fichte, On the Basis of Our Belief in a Divine Governance of the World

We need faith for everything, and we use it a lot more often than we realize.

If faith is believing without really knowing, then we put faith in all sorts of things.

How often have you read something or heard something for a friend and accepted it without thought? Why are you so certain of the knowledge you have?

Certainty is based in some degree of faith, in taking a leap and hoping that we’re right.