How tempting it is to raise high walls and keep out change. Rot here in our own self-satisfied comfort. - Frank Herbert

Do you know what guerrillas often say? They claim that their rebellions are invulnerable to economic warfare because they have no economy, that they are parasitic on those they would overthrow. The fools merely fail to access the coin in which they must inevitably pay. The pattern is inexorable in its degenerative failures. You see it repeated in the systems of slavery, of welfare states, of caste-ridden religions, of socializing bureaucracies — in any system in which creates and maintains dependencies. Too long a parasite and you cannot exist without a host.

"Wild Fremen said it well: "Four things cannot be hidden — love, smoke, a pillar of fire and a man striding across the open bled.

It wasn’t the kind of answer he'd expected — too subtly penetrating and leaving too much uncommitted. He reminded himself that it was difficult to control uncommitted people. Once a man had invested his energies, he could be twisted and turned at will... but if the man held back, conserved those energies...