It is unlikely that the good of a snail should reside in its shell: so is it likely that the good of a man should?

The materials are indifferent, but the use we make of them is not a matter of indifference.

Act your part with honor.

To a reasonable creature, that alone is insupportable which is unreasonable; but everything reasonable may be supported.

The soul's impurity consists in bad judgements, and purification consists in producing in it right judgements, and the pure soul is one which has right judgements, for this alone is proof against confusion and pollution in its functions.

It is impossible for a man to learn what he thinks he already knows.

When you close your doors, and make darkness within, remember never to say that you are alone, for you are not alone; nay, God is within, and your genius is within. And what need have they of light to see what you are doing?