Albert Barnes' Notes on the Whole Bible - John 13:35
By this shall all men ... - That is, your love for each other shall be so decisive evidence that you are like the Saviour, that all people shall see and know it. It shall be the thing by which you shall be known among all men. You shall not be known by special rites or habits; not by a special form of dress or manner of speech; not by special austerities and unusual customs, like the Pharisees, the Essenes, or the scribes, but by deep, genuine, and tender affection. And it is well known it was... read more
The Pulpit Commentary - John 13:35
By (or, in ) this shall all men know that ye are my disciples, if ye have love one toward another . Not by works of majesty and power, but by love to one another. All commentators refer to the well-known saying of St. John at Ephesus, as recorded by Jerome, "This is the Lord's commandment. If ye love one another it is enough" (Tholuck refers to Tertullian's 'Apol.,' 39; Minucius Felix, "They love before they know each other ;" and Lucian, "Their Master makes them believe they are... read more