two souls, alas, are housed within my breast, and each will wrestle for the mastery there.

Everything in the world may be endured except continual prosperity.

If you must tell me your opinions, tell me what you believe in. I have plenty of doubts of my own.

One never goes so far as when one doesn't know where one is going.

If the world does improve on the whole, yet youth must always begin anew, and go through the stages of culture from the beginning.

The thought of death leaves me in perfect peace, for I have a firm conviction that our spirit is a being of indestructible nature; it works on from eternity to eternity, it is like the sun, which though it seems to set to our mortal eyes, does not really set, but shines on perpetually.

To quit smoking, you must first want to quit, but then you must also do the quitting