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.

Nothing has such power to broaden the mind as the ability to investigate systematically and truly all that comes under thy observation in life.

Truth and ceremony are two things.

Mark how fleeting and paltry is the estate of man - yesterday in embryo, tomorrow a mummy or ashes. So for the hairsbreadth of time assigned to thee, live rationally, and part with life cheerfully, as drops the ripe olive, extolling the season that bore it and the tree that matured it.

Always run to the short way; and the short way is the natural: accordingly say and do everything in conformity with the soundest reason. For such a purpose frees a man from trouble, and warfare, and all artifice and ostentatious display.

Nothing proceeds from nothingness, as also nothing passes away into non-existence.

Neither in writing nor in reading wilt thou be able to lay down rules for others before thou shalt have first learned to obey rules thyself.