Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.

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.

Make me the the master of education, and I will undertake to change the world.

Every substance is as a world apart, independent of everything else except God.

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.

To love is to take delight in happiness of another, or, what amounts to the same thing, it is to account another's happiness as one's own.

It is a good thing to proceed in order and to establish propositions. This is the way to gain ground and to progress with certainty.