The deepest rivers flow with the least sound.
The mob has no ruler more potent than superstition.
Doctors cure the more serious diseases with harsh remedies. Curtius Medici graviores morbos asperis remediis curant
Nothing is so secure in its position as not to be in danger from the attack even of the weak.
A cowardly cur barks more fiercely than it bites.
Timid dogs more eagerly bark than bite.