and here, too:
Matt 24:13 "But the one who endures to the end, he will be saved.
Oh, and let us certainly not forget this one, which could not be more clear!:
Rom 11:20 Quite right, they were broken off for their unbelief, but you stand by your faith. Do not be conceited, but fear;
Rom 11:21 for if God did not spare the natural branches, He will not spare you, either.
Rom 11:22 Behold then the kindness and severity of God; to those who fell, severity, but to you, God's kindness, if you continue in His kindness; otherwise you also will be cut off.