John 13:17 Commentary - Garner-Howes Baptist Commentary
1 ) "If ye know these things," (ei tauta oidate) "If you all perceive or comprehend these things," these matters of humility, hospitality, and lowly service to one another and men about you, in general, Jas 1:25, Gal 5:13. For to the one knowing "to do good" and doing it not, to him it is sin, Jas 4:17.
2) "Happy are ye," (makarioi este) "You are happy," or exist with spiritual prosperity. Happiness comes to one, not through seeking or searching for it, but in honorable moral and ethical behavior before and in behalf of others, in service to God, and one's fellow man, Mat 20:28; Job 5:17; Pro 16:20; 1Pe 4:14.
3) "If ye do them" (ean poiete auta) "If you do them." The doer of the Word is blessed and happy, not the hearer only, Jas 1:22; Joh 14:15; Joh 15:14; Eph 2:10. Sorrow, sadness, and despond come primarily to those who serve neither God nor their fellow man, bringing guilt, shame, fear, and a feeling of inadequacy to their lives, Jas 4:17; Gal 6:9; 2Ti 4:7-8.
Consult other comments:
John 13:17 - Expository Notes with Practical Observations on the New Testament
John 13:17 - Calvin's Complete Commentary
John 13:17 - The Cambridge Bible for Schools and Colleges
John 13:17 - Adam Clarke's Commentary and Critical Notes on the Bible
John 13:17 - Expository Notes of Dr. Constable (Old and New Testaments)
John 13:17 - Ellicott's Commentary for English Readers (Old and New Testaments)
John 13:17 - The Expositor’s Greek Testament by Robertson
John 13:17 - Garner-Howes Baptist Commentary
John 13:17 - John Gill's Exposition of the Entire Bible
John 13:17 - Gnomon of the New Testament
John 13:17 - Charles Simeon's Horae Homileticae (Old and New Testaments)
John 13:17 - Church Pulpit Commentary
John 13:17 - English Annotations on the Holy Bible by Matthew Poole
John 13:17 - Old and New Testaments Restoration Commentary
John 13:17 - Robertson's Word Pictures in the New Testament
John 13:17 - A Popular Commentary on the New Testament
John 13:17 - John Trapp's Complete Commentary (Old and New Testaments)
John 13:17 - The Treasury of Scripture Knowledge
John 13:17 - Vincent's Word Studies in the New Testament
John 13:17 - Whedon's Commentary on the Old and New Testaments
Garner-Howes Baptist Commentary

The Garner-Howes Baptist Commentary of the Whole Bible was originally published as a 23-volume set by Albert Garner (principal author) along with J. C. Howes, G.F. Crumley, and Eugene Garner in 1985. The Blessed Hope Foundation has released this digital edition into the public domain.