Everything has its wonders, even darkness and silence, and I learn, whatever state I may be in, therein to be content.

The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature.

Happiness in intelligent people is the rarest thing I know.

There is only one way to happiness and that is to cease worrying about things which are beyond the power of our will.

Just do what must be done. This may not be happiness, but it is greatness.