What is important for a leader is that which makes him a leader. It is the needs of his people.

One learns from books and example only that certain things can be done. Actual learning requires that you do those things.

This is the awe-inspiring universe of magic: There are no atoms, only waves and motions all around. Here, you discard all belief in barriers to understanding. You put aside understanding itself. This universe cannot be seen, cannot be heard, cannot be detected in any way by fixed perceptions. It is the ultimate void where no preordained screens occur upon which forms may be projected. You have only one awareness here—the screen of the magi: Imagination! Here, you learn what it is to be human. You are a creator of order, of beautiful shapes and systems, an organizer of chaos.

Leto turned a hard stare at Kynes. And Kynes, returning the stare, found himself troubled by a fact he had observed here: This Duke was concerned more over the men than he was over the spice. He risked his own life, and that of his son to save the men. He passed off the loss of a spice crawler with a gesture. The threat to men's lives had him in a rage. A leader such as that would command fanatic loyalty. He would be difficult to defeat. Against his own will and all previous judgements, Kynes admitted to himself: I like this Duke.

Emotions are the curse of logic.

Any road followed precisely to its end leads precisely nowhere. Climb the mountain just a little bit to test it's a mountain. From the top of the mountain, you cannot see the mountain.

Something cannot emerge from nothing.