You can be invincible, if you enter into no contest in which it is not in your power to conquer.

Nothing truly stops you. Nothing truly holds you back. For your own will is always within your control.

It is not things in themselves which trouble us, but our opinions of things.

Not every difficult and dangerous thing is suitable for training, but only that which is conducive to success in achieving the object of our effort.

Any one thing in the creation is sufficient to demonstrate a Providence to a humble and grateful mind.

Happiness and freedom begin with a clear understanding of one principle: Some things are within our control, and some things are not. It is only after you have faced up to this fundamental rule and learned to distinguish between what you can and can't control that inner tranquility and outer effectiveness become possible.

I must die. I must be imprisoned. I must suffer exile. But must I die groaning? Must I whine as well? Can anyone hinder me from going into exile with a smile? The master threatens to chain me: what say you? Chain me? My leg you will chain--yes, but not my will--no, not even Zeus can conquer that.