The most extraordinary thing about a really good teacher is that he or she transcends accepted educational methods. Such methods are designed to help average teachers approximate the performance of good teachers.

There is no lonelier person than the one who lives with a spouse with whom he or she cannot communicate.

No one will live all his life in the world into which he was born and no one will die in the world in which he worked in his maturity.

You can no longer save your family, tribe or nation. You can only save the whole world.

We are at a point in history where a proper attention to space, and especially near space, may be absolutely crucial in bringing the world together.

With the exception of the few cases to be discussed in the next chapter, adolescence represented no period of crisis or stress, but was instead an orderly developing of a set of slowly maturing interests and activities.

The assumption that men were created equal, with an equal ability to make an effort and win an earthly reward, although denied every day by experience, is maintained every day by our folklore and our daydreams.