The physician heals, Nature makes well.
The energy or active exercise of the mind constitutes life.
Rightness in our choice of an end is secured by [Moral] Virtue.
There is no genius who hasn't a touch of insanity.
No science ever defends its first principles.
A life of wealth and many belongings is only a means to happiness. Honor, power, and success cannot be happiness because they depend on the whims of others, and happiness should be self-contained, complete in itself.