The Feast of St. Hilary of Poitiers, Bishop and Doctor of the Church
is today. There is information on him here.

The noble-minded Hilary was intemperate in his language, and assailed Constantius with an asperity unbecoming a dutiful subject.

Venerable John Henry Newman, The Arians of the Fourth Century
It's not exactly edifying, but I'll admit I'm fond finding saints who had trouble controlling their 'asperity' !