He that hath them in mind, and keepeth them in life; he that hath them in words, and keepeth them in works; he that hath them by hearing, and keepeth them by doing; he that hath them by doing, and keepeth them by persevering, he it is that loveth Me. Love must be shewn by works, or it is a mere barren name.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Tract. lxxv. 5