Men act like brutes in so far as the sequences of their perceptions arise through the principle of memory only, like those empirical physicians who have mere practice without theory.

Either there are no corporeal substances, and bodies are merely phenomena which are true or consistent with each other, such as a rainbow or a perfectly coherent dream, or there is in all corporeal substances something analogous to the soul.

And there must be simple substances, because there are compounds; for the compound is nothing but a collection or aggregatum of simples.

We live in the best of all possible worlds

To love is to place happiness in the heart of another.

There is nothing waste, nothing sterile, nothing dead in the universe; no chaos, no confusions, save in appearance.

Virtue is the habit of acting according to wisdom.