If we regulate our conduct according to our own convictions, we may safely disregard the praise or censure of others.

The mind has its arrangement; it proceeds from principles to demonstrations. The heart has a different mode of proceeding.

It is your own assent to yourself, and the constant voice of your own reason, and not of others, that should make you believe.

Reason commands us far more imperiously than a master; for in disobeying the one we are unfortunate, and in disobeying the other we are fools.

No animal admires another animal.

Unable to make what is just strong, we have made what is strong just.

What part of us feels pleasure? Is it our hand, our arm, our flesh, or our blood? It must obviously be something immaterial.