4 quotes from Frank Herbert

Seek freedom and become captive of your desires. Seek discipline and find your liberty.
— Frank Herbert, Chapterhouse: Dune
A process cannot be understood by stopping it. Understanding must move with the flow of the process, must join it and flow with it.
— Frank Herbert
Confine yourself to observing and you always miss the point of your life. The object can be stated this way: Live the best life you can. Life is a game whose rules you learn if you leap into it and play it to the hilt. Otherwise, you are caught off balance, continually surprised by the shifting play. Non-players often whine and complain that luck always passes them by. They refuse to see that they can create some of their own luck.
— Frank Herbert, Chapterhouse: Dune
The mind can go either direction under stress—toward positive or toward negative: on or off. Think of it as a spectrum whose extremes are unconsciousness at the negative end and hyperconsciousness at the positive end. The way the mind will lean under stress is strongly influenced by training.
— Frank Herbert, Dune