We each decide whether to make ourselves learned or ignorant, compassionate or cruel, generous or miserly. No one forces us. No one decides for us, no one drags us along one path or the other. We are responsible for what we are.

All forces that reside in the body are angels.

Teach thy tongue to say 'I do not know,' and thou shalt progress.

How individuals of the same species surpass each other in these sensations and in other bodily faculties is universally known, but there is a limit to them, and their power cannot extend to every distance or to every degree.

Inspire me with love for my art and for thy creatures. In the sufferer let me see only the human being.

We each decide whether to make ourselves learned or ignorant, compassionate or cruel, generous or miserly. No one forces us. No one decides for us, no one drags us along one path or the other. We are responsible for what we are.

Consequently he who wishes to attain to human perfection, must therefore first study Logic, next the various branches of Mathematics in their proper order, then Physics, and lastly Metaphysics.