A man's worth is no greater than his ambitions.

Hast thou reason? I have. Why then dost not thou use it? For if this does its own work, what else dost thou wish?

Observe always that everything is the result of a change, and get used to thinking that there is nothing Nature loves so well as to change existing forms and to make new ones like them.

When pain is unbearable it destroys us; when it does not it is bearable.

Think of the universal substance, of which thou has a very small portion; and of universal time, of which a short and indivisible interval has been assigned to thee; and of that which is fixed by destiny, and how small a part of it thou art

When thou art above measure angry, bethink thee how momentary is man's life.

Your days are numbered. Use them to throw open the windows of your soul to the sun. If you do not, the sun will soon set, and you with it.