He must watch it, check it, repress it, and obey it only at the last extremity.

There may be some fault even in this obedience; but the fault thus committed is venial; it is a fall, but a fall on the knees which may terminate in prayer.
"To be a saint is the exception; to be an upright man is the rule.

Err, fall, sin if you will, but be upright.
"The least possible sin is the law of man.

No sin at all is the dream of the angel.

All which is terrestrial is subject to sin.