Hebrews 9:15-17

So Jesus is the One who has enacted a new covenant with a new relationship with God so that those who accept the invitation will receive the eternal inheritance he has promised to his heirs. For he died to release us from the guilt of the violations committed under the first covenant. Now a person’s last will and testament can only take effect after one has been proven to have died; otherwise the will cannot be in force while the person who made it is still alive.