Discretio est scire per legem quid sit justum

Dictionary: 
Ballentine's Law Dictionary

Discretion is the knowledge of that which is just by the law. See 4 Johns. Ch. (N. Y.) 352.

Author: 
James A. Ballentine
Publisher: 
The Bobbs-Merrill Company
Year Published: 
1916
Genre: 
Law Dictionary