Hebrews 11:2

1Now faith is assurance of things hoped for, proof of things not seen.

2For by this, the elders obtained approval.

3By faith we understand that the universe has been framed by the word of God, so that what is seen has not been made out of things which are visible.

4By faith Abel offered to God a more excellent sacrifice than Cain, through which he had testimony given to him that he was righteous, God testifying with respect to his gifts; and through it he, being dead, still speaks.