"… one can still say that quantum mechanics is the key to understanding magnetism. When one enters the first room with this key there are unexpected rooms beyond, but it is always the master key that unlocks each door."

"A father is rarely a good teacher; either he thinks he knows things and finds his knowledge to be very slight, or he knows but explains badly, or he is too severe and impatient because teaching bores …"

"The writers against religion, whilst they oppose every system, are wisely careful never to set up any of their own."

"There is a difference between tragedy and blind brutal calamity. Tragedy has meaning, and there is dignity in it. Tragedy stands with its shoulders stiff and proud. But there is no meaning, no dignity…"

"Freemasonry, in its development, in its growing power at first and later in its decadence, represented in a way the development, power, and moral and intellectual decadence of the bourgeoisie. Today, …"