A child's natural form of behavior is play, and in our aim to educate, play should be honored and preserved for as long past childhood as can be.

If we look at our attitudes consistently and work out the logical implications we're on the road to moral progress, moral understanding.

Plato's concern is not just an intellectual issue, but it is knitted with emotional life as well.

And then there is Pythagoras. The legend is that the founder of theoretical mathematics was so outraged when one of his students, the haplessly gifted Hippasus, discovered irrational numbers that he sent the poor fellow out on a raft to drown, initiating a venerable tradition of professors mistreating their graduate students.

Children, who have so much to learn in so short a time, had involved the tendency to trust adults to instruct them in the collective knowledge of our species, and this trust confers survival value. But it also makes children vulnerable to being tricked and adults who exploit this vulnerability should be deeply ashamed.

Everybody makes excuses for themselves they wouldn't be prepared to make for other people.

How can those who possess all knowledge, which must include knowledge of life that is worth living, be interested in using knowledge only for the insignificant aim of making money?