It may be that Paul here has haunting his memory our Lord's words which we have just quoted; and, in any case, he is in beautiful accord with his brother Peter, who begins all the exhortations of his epistle with the words, 'Wherefore, girding up the loins of your mind, be sober, and set your minds perfectly upon the grace that is to be brought unto you at the revelation of Jesus Christ.' Peter, indeed, is not thinking of the soldier's belt, but he is, no doubt, remembering many a time when, in the toils of the fishing-boat, he had to tighten his robes round his waist to prepare for tugging at the oar, and he feels that such concentration is needful if a Christian life is ever to be sober, and to have its hope set perfectly on Christ and His grace. II. The girdle is to be truth. The question immediately arises as to whether truth here means objective truth--the truth of the Gospel, or subjective truth, or, as we are accustomed to say, truthfulness. It would seem that the former signification is rather included in the sword of the Spirit, which is the word of God, and it is best to regard the phrase 'with (literally "in") truth' here as having its ordinary meaning, of which we may take as examples the phrases, 'the unleavened bread of sincerity and truth'; 'love rejoiceth not in unrighteousness, but rejoiceth with the truth'; 'whom I love in truth.' Absolute sincerity and transparent truthfulness may well be regarded as the girdle which encloses and keeps secure every other Christian grace and virtue. We do not need to go far to find a slight tinge of unreality marring the Christian life: we have only to scrutinise our own experiences to detect some tendency to affectation, to saying a little more than is quite true, even in our sincerest worship. And we cannot but recognise that in all Christian communities there is present an element of conventionalism in their prayers, and that often the public expression of religious emotions goes far beyond the realities of feeling in the worshippers. In fact, terrible as the acknowledgment may be, we shall be blind if we do not recognise that the average Christianity of this day suffers from nothing more than it does from the lack of this transparent sincerity, and of absolute correspondence between inward fact and outward expression. Types of Christianity which make much of emotion are, of course, specially exposed to such a danger, but those which make least of it are not exempt, and we all need to lay to heart, far more seriously than we ordinarily do, that God 'desires truth in the outward parts.' The sturdy English moralist who proclaimed 'Clear your mind of cant' as the first condition of attaining wisdom, was not so very far from Paul's point of view in our text, but his exhortation covered but a small section of the Apostle's.