“There are roads which must not be followed, armies which must not be attacked, towns which must not be besieged, positions which must not be contested, commands of the sovereign which must not be obeyed.”

“The principle on which to manage an army is to set up one standard of courage which all must reach.”

“Life is entrusted to man as a treasure which must not be squandered, as a talent which must be used well.”

“That which is original creates a new origin. That which is original, by definition, must stray off the previously worn paths. It must wander; it must err.”

“Listen. There is a sound like the knocking of railway trucks in a siding. That is the happy concatenation of one event following another in our lives. Knock, knock, knock. Must, must, must. Must go, must sleep, must wake, must get up — sober, merciful word which we pretend to revile, which we press tight to our hearts, without which we should be undone. How we worship that sound like the knocking together of trucks in a siding!”

“That which must not, can not be.”