Logic is like the sword - those who appeal to it, shall perish by it.

A physician's physiology has much the same relation to his power of healing as a cleric's divinity has to his power of influencing conduct.

To give pain is the tyranny; to make happy, the true empire of beauty.

We are not won by arguments that we can analyse but by tone and temper, by the manner which is the man himself.

Let us be grateful to the mirror for revealing to us our appearance only.

Think of and look at your work as though it were done by your enemy. I you look at it to admire it, you are lost.

Is life worth living? This is a question for an embryo not for a man.