‘For I rejoiced greatly, when brethren came and bore witness to your truth, even as you walk in truth. Greater joy have I none than this, to hear of my children walking in the truth.'
But his greatest rejoicing is in that Gaius walks in the truth. John is often called the Apostle of ‘love' but he always lays great stress on ‘truth'. His rejoicing was because Gaius walked in the truth, because he walked in the light with God (1 John 1:5-7). Thus he was true both in belief, in understanding and in behaviour. And when others came to John from where Gaius lived, all bore testimony to his glowing Christian life, and to the fact that he was a man of the truth. And especially that he knew the truth about Jesus as both God and man, and Saviour, and lived accordingly. This was one reason why John loved him.