Fire is to represent truth because it destroys all sophistry and lies; and the mask is for lying and falsehood which conceal truth.
You will never have a greater or lesser dominion than that over yourself.
It's easier to resist at the beginning than at the end.
The supreme misfortune is when theory outstrips performance
There is no result in nature without a cause; understand the cause and you will have no need of the experiment.
It's not enough that you believe what you see. You must also understand what you see.