If you wish me well, do not stand pitying me, but lend me some succour as fast as you can; for pity is but cold comfort when one is up to the chin in water, and within a hair's breadth of starving or drowning.
Once a wolf, always a wolf.
Distrust interested advice.
A fair-minded person tries to see both sides of an argument.
Example is the best precept.
Beware lest you lose the substance by grasping at the shadow.