The constant recollection of death is the test of human conduct.

He who follows reason in all things is both tranquil and active at the same time, and also cheerful and collected.

How much more grievous are the consequences of anger than the causes of it.

The substance of the universe is obedient and compliant; and the reason which governs it has in itself no cause for doing evil, for it has no malice, nor does it do evil to anything, nor is anything harmed by it. But all things are made and perfected according to this reason.

No form of nature is inferior to art; for the arts merely imitate natural forms.

Happiness is no other than soundness and perfection of mind.

Do not think that what is hard for you to master is humanly impossible; but if a thing is humanly possible, consider it to be within your reach.