Romans 14:5-7

New Catholic Bible

⁵ One person may consider one day to be more sacred than another, while another may judge all days to be alike. Let everyone be convinced in his own beliefs. ⁶ Whoever observes the day observes it for the Lord. Also, the one who eats, eats in honor of the Lord, since he gives thanks to God, while the one who abstains, abstains in honor of the Lord and thereby also gives thanks to God.

⁷ None of us lives for himself, and none of us dies for himself.