No More Learning

Temperate I am, yet never had a temper;
Modest I am, yet with some slight assurance;
Changeable too, yet somehow idem semper;
Patient, but not enamoured of endurance;
Cheerful, but sometimes rather apt to whimper;
Mild, but at times a sort of           furens;
So that I almost think that the same skin
For one without has two or three within.