In prosperity it is very easy to find a friend; but in adversity it is the most difficult of all things.
The origin of sorrow is this: to wish for something that does not come to pass.
It's not what happens to you, but how you react to it that matters.
No great thing is created suddenly.
It is a mark of a mean capacity to spend much time on the things which concern the body, such as much exercise, much eating, much drinking, much easing of the body, much copulation. But these things should be done as subordinate things: and let all your care be directed to the mind.
If what charms you is nothing but abstract principles, sit down and turn them over quietly in your mind: but never dub yourself a Philosopher.