Such an experience as shines through the words of the Apostle in this passage furnishes the key to one of the best known but least understood words of our Saviour. "Verily I say unto you," said Jesus to the twelve, "there is no man that hath left house, or wife, or brethren, or parents, or children, for the Kingdom of God's sake, who shall not receive manifold more in this time, and in the world to come eternal life." These words might almost stand for a description of Paul. He had given up everything for Christ's sake. He had no home, no wife, no child; as far as we can see, no brother or friend among all his old acquaintances. Yet we may be sure that not one of those who were most richly blessed with all these natural relations and natural affections knew better than he what love is. No father ever loved his children more tenderly, fervently, austerely and unchangeably than Paul loved those whom he had begotten in the gospel. No father was ever rewarded with affection more genuine, obedience more loyal, than many of his converts rendered to him. Even in the trials of love, which search it, and strain it, and bring out its virtues to perfection--in misunderstandings, ingratitude, wilfulness, suspicion--he had an experience with blessings of its own in which he surpassed them all. If love is the true wealth and blessedness of our life, surely none was richer or more blessed than this man, who had given up for Christ's sake all those relations and connections through which love naturally comes. Christ had fulfilled to him the promise just quoted; He had given him a hundredfold in this life, houses and brothers and sisters and mothers and children. It would have been nothing but loss to cling to the natural affections and decline the lonely apostolic career. There is something wonderfully vivid in the idea which Paul gives of his love for the Thessalonians. His mind is full of them; he imagines all the circumstances of trial and danger in which they may be placed; if he could only be with them at need! He seems to follow them as a woman follows with her thoughts the son who has gone alone to a distant town; she remembers him when he goes out in the morning, pities him if there are any circumstances of hardship in his work, pictures him busy in shop or office or street, looks at the clock when he ought to be home for the day; wonders where he is, and with what companions, in the evening; and counts the days till she will see him again. The Christian love of the Apostle, which had no basis at all in nature, was as real as this; and it is a pattern for all those who try to serve others in the gospel. The power of the truth, as far as its ministers are concerned, depends on its being spoken in love; unless the heart of the preacher or teacher is really pledged to those to whom he speaks, he cannot expect but to labour in vain.