John Calvin Commentary Romans 14:7

"For none of us liveth to himself, and none dieth to himself." — Romans 14:7 (ASV)

For no one of us, etc. He now confirms the former verse by an argument derived from the whole to a part—that it is no wonder that particular acts of our life should be referred to the Lord’s will, since life itself ought to be wholly spent to his glory. For then only is the life of a Christian rightly formed, when it has for its object the will of God.

But if you ought to refer whatever you do to his good pleasure, it is then an act of impiety to undertake anything whatever, which you think will displease him; indeed, which you are not persuaded will please him.