"Bien mal acquis ne profite jamais."

"Nothing succeeds like success."

"Genes aren’t everything. Environment counts too, and environment can bend into actual psychosis where genes indicate …"

"There isn’t an instinct around that can’t give way to a good, persistent education. Not in human beings, where instin…"

"He had writer's block once. It was the worst ten minutes of his life."

"“Is that important?” “Everything is important till proven otherwise.”"

"There are degrees of justice, Elijah. When the lesser is incompatible with the greater, the lesser must give way."

"Remember, you once said, Lije, that people sometimes mistake their own shortcomings for those of society and want to …"

"Civilizations have always been pyramidal in structure. As one climbs toward the apex of the social edifice, there is …"

"A robot, the man had said, is logical but not reasonable."