“the useful is the noble and the hurtful is the base”

“A good decision is based on knowledge and not on numbers.”

“All learning has an emotional base.”

“It is our duty to select the best and most dependable theory that human intelligence can supply, and use it as a raft to ride the seas of life.”

“Well, you know what happens to lovers: whenever they see a lyre, a garment or anything else that their beloved is accustomed to use, they know the lyre, and the image of the boy to whom it belongs comes into their mind.”

“Knowledge which is acquired under compulsion has no hold on the mind. Therefore do not use compulsion, but let early education be a sort of amusement; you will then be better able to discover the child's natural bent.”

“Then Prometheus, in his perplexity as to what preservation he could devise, stole from Hephaestus and Athena wisdom in the arts together with fire -- since by no means without fire could it be acquired or helpfully used by any -- and he handed it there and then as a gift to man.”