“It is in the nature of the human being to seek a justification for his actions.”

“The talent for self-justification is surely the finest flower of human evolution, the greatest achievement of the human brain. When it comes to justifying actions, every human being acquires the intelligence of an Einstein, the imagination of a Shakespeare, and the subtlety of a Jesuit.”

“History is a record of human nature in action.”

“When people attempt to rebel against the iron logic of Nature, they come into conflict with the very same principles to which they owe their existence as human beings. Their actions against Nature must lead to their own downfall.”

“Nature, not yet polluted by human beings, hence his early rising.”

“Despite the Great Chain of Being's traditional ranking of humans between animals and angels, there is no evolutionary justification for the common assumption that evolution is somehow 'aimed' at humans, or that humans are 'evolution's last word'.”