"But attack can take strange forms. And you will remember the tooth. The tooth. Duke Leto Atreides. You will remember the tooth." -Dr.Yueh - Frank Herbert

"Enter no conflict against fanatics unless you can defuse them. Oppose a religion with another religion only if your proofs (miracles) are irrefutable or if you can mesh in a way that the fanatics accept you as god-inspired. This has long been the barrier to science assuming a mantle of divine revelation. Science is so obviously man-made. Fanatics (and many are fanatic on one subject or another) must know where you stand, but more important, must recognise who whispers in your ear." - Missionaria Protectiva, Primary Teaching.

Enemies strengthen you. Allies weaken.

And always, he fought the temptation to choose a clear, safe course, warning 'That path leads ever down into stagnation.