Hebrews 6:18; Hebrews 10:1; Hebrews 11:1

18 so that by two unchangeable things in which it is impossible for God to lie, we who have taken refuge would have strong encouragement to take hold of the hope set before us.
1 For the Law, since it has only a shadow of the good things to come and not the very form of things, can never, by the same sacrifices which they offer continually year by year, make perfect those who draw near.
1 Now faith is the assurance of things hoped for, the conviction of things not seen.