If ye know these things, happy are ye if ye do them.–JOHN xiii. 17.
_Therefore to him that knoweth to do good, and doeth it not, to him it is sin_.–JAMES iv. 17.

We cannot kindle when we will The fire that in the heart resides, The spirit bloweth and is still, In mystery our soul abides: But tasks in hours of insight willed Can be through hours of gloom fulfilled.
MATTHEW ARNOLD.
Hurt not your conscience with any known sin.
S. RUTHERFORD.
Deep-rooted customs, though wrong, are not easily altered; but it is the duty of all to be firm in that which they certainly know is right for them.
JOHN WOOLMAN.
He often acts unjustly who does not do a certain thing; not only he who does a certain thing.
MARCUS ANTONINUS.
Every duty we omit obscures some truth we should have known.
JOHN RUSKIN.