The deepest rivers flow with the least sound.
The mob has no ruler more potent than superstition.
A timid dog barks more violently than it bites. Curtius Canis timidus vehementius latrat quam mordet
Nothing is strong that may not be endangered even by the weak.
Nothing is so secure in its position as not to be in danger from the attack even of the weak.
Doctors cure the more serious diseases with harsh remedies. Curtius Medici graviores morbos asperis remediis curant