All philosophy lies in two words, sustain and abstain.
We tell lies, yet it is easy to show that lying is immoral.
Freedom is secured not by the fulfillment of one's desires, but by the removal of desire.
He is a drunkard who takes more than three glasses though he be not drunk.
If virtue promises happiness, prosperity and peace, then progress in virtue is progress in each of these for to whatever point the perfection of anything brings us, progress is always an approach toward it.
Make the best use of what is in your power, and take the rest as it happens.