Hebrews 11:1-3, 6, 33-40

Now faith is the assurance of things hoped for, the conviction of things not seen. For by it the men of old gained approval. By faith we understand that the worlds were prepared by the word of God, so that what is seen was not made out of things which are visible.

And without faith it is impossible to please Him, for he who comes to God must believe that He is and that He is a rewarder of those who seek Him.

who by faith conquered kingdoms, performed acts of righteousness, obtained promises, shut the mouths of lions, quenched the power of fire, escaped the edge of the sword, from weakness were made strong, became mighty in war, put foreign armies to flight. Women received back their dead by resurrection; and others were tortured, not accepting their release, so that they might obtain a better resurrection; and others experienced mockings and scourgings, yes, also chains and imprisonment. They were stoned, they were sawn in two, they were tempted, they were put to death with the sword; they went about in sheepskins, in goatskins, being destitute, afflicted, ill-treated (men of whom the world was not worthy), wandering in deserts and mountains and caves and holes in the ground. And all these, having gained approval through their faith, did not receive what was promised, because God had provided something better for us, so that apart from us they would not be made perfect.