Try to live in peace with everyone, and seek to live a clean and holy life, for those who are not holy will not see the Lord.
Look after each other so that none of you will miss out on the special favor of God. Watch out that no bitter root of unbelief rises up among you, for whenever it springs up, many are corrupted by its poison.
Make sure that no one is immoral or godless like Esau. He traded his birthright as the oldest son for a single meal.
And afterward, when he wanted his father's blessing, he was rejected. It was too late for repentance, even though he wept bitter tears.