When men achieve the fruits of their material success, they often become aware of an emptiness--an incompleteness--in their lives;the hollowness of having, but not raising, children, of not making true commitments to them. Which, sadly, does not mean that they weren't capable of it.

I not only think that we will tamper with Mother Nature, I think Mother wants us to.

Man, the most complicated of the animals, has a relatively short gestation period. Beyond that, he will be born, unlike most mammals, in a ridiculously helpless state.

Jealousy, which serves the struggle for survival, can deteriorate into the envy which draws defeat even from victory.

Our imagination and reasoning powers facilitate anxiety; the anxious feeling is precipitated not by an absolute impending threat-such as the worry about an examination, a speech, travel-but rather by the symbolic and often unconscious representations.

A street thug and a paid killer are professionals - beasts of prey, if you will, who have dissociated themselves from the rest of humanity and can now see human beings in the same way that trout fishermen see trout.

Feelings are the fine instruments which shape decision-making in an animal cursed and blessed with intelligence, and the freedom which is its corollary. They are signals directing us toward goodness, safety, pleasure, and group survival.