Hebrews 2:1; Hebrews 4:1; Hebrews 9:17

1 For this reason we must pay much closer attention to what we have heard, so that we do not drift away from it.
1 Therefore, let us fear if, while a promise remains of entering His rest, any one of you may seem to have come short of it.
17 For a covenant is valid only when men are dead, for it is never in force while the one who made it lives.