It is Homer who has chiefly taught other poets the art of telling lies skillfully.

[I]t is rather the case that we desire something because we believe it to be good than that we believe a thing to be good because we desire it. It is the thought that starts things off.

It is not sufficient to know what one ought to say, but one must also know how to say it.

It is of the nature of desire not to be satisfied, and most men live only for the gratification of it.

Conscientious and careful physicians allocate causes of disease to natural laws, while the ablest scientists go back to medicine for their first principles.

Intuition is the source of scientific knowledge.

If, therefore, there is any one superior in virtue and in the power of performing the best actions, him we ought to follow and obey, but he must have the capacity for action as well as virtue.