Do not meddle in the affairs of wizards, for they are subtle and quick to anger. The Fellowship of the Ring

Physiologists and molecular biologists regularly fall into the trap of overlooking this distinction, which is fundamental to biology, history, and human behavior. Physiology and molecular biology can do no more than identify proximate mechanisms; only evolutionary biology can provide ultimate causal explanations. Why Is Sex Fun?: The Evolution of Human Sexuality

Not merely in the realm of commerce but in the world of ideas as well our age is organizing a regular clearance sale. Everything is to be had at such a bargain that it is questionable whether in the end there is anybody who will want to bid. Every speculative price-fixer who conscientiously directs attention to the significant march of modern philosophy, every Privatdocent, tutor, and student, every crofter and cottar goes further. Perhaps it would be untimely and ill-timed to ask them where they are going. Fear and Trembling

The instinct for self-deception in human beings makes them try to banish from their minds dangers of which at bottom they are perfectly aware by declaring them non-existent. Beware of Pity