I can, therefore I am.
Things do not happen. Things are made to happen.
To know oneself, one should assert oneself.
Wherever you are - be all there.
Begin to be now what you will be hereafter.
What you do today can improve all your tomorrows.
Be thine own palace, or the world's thy jail.
Expect problems and eat them for breakfast.
Well done is better than well said.
Always desire to learn something useful.
I shall endeavour still further to prosecute this inquiry, an inquiry I trust not merely speculative, but of sufficient moment to inspire the pleasing hope of its becoming essentially beneficial to mankind.