This truth of fellowship in Christ which the nave suggests, we confess our belief in when we say, "I believe in the holy Catholic Church; The Communion of Saints." The pictures of the saints of the Old and the New Testament, of the angels who worship Christ our Saviour, and of the men blessed by Him when on earth, which shine for us in the windows, may help to give it reality in our thought. The four main walls of the church, which are supposed to represent the four Evangelists, and the pillars, "which, as the chief supports of the fabric, are said to represent the Apostles, prophets, and martyrs," may remind us also of the holy and glorious fellowship into which we have been brought. This fellowship in Christ is one of the means which God's love uses for helping and saving men. {24} We are helped by it. We must by it help others. Let us build, it, then, into the daily life, as it is built into the very stones of the church. _The Transepts._--The transepts are the part of the church which gives to the building the cruciform shape. Crossing the nave before the entrance to the chancel, running the one to the north, the other to the south, they complete the outline of the cross. Upon the arms of such a cross our Saviour hung as He died for us. The transepts may bring us, then, as we remember this, the thought of _sacrifice_, that our lives to be truly Christian must have the spirit of the Cross worked into them. It was by offering Himself in sacrifice that Christ redeemed us, and it is by offering ourselves to Him in sacrifice, by self-denial for His cause, and by doing good (at some cost to ourselves) to others for His sake, that we make the response He asks to His love. That offering of ourselves must be made not only by our lips in the act of worship, but also by our lives, in deeds. So, also, the spirit of Christ is the spirit of service, through love, in behalf of others--the spirit of true fellowship. Now we cannot realize that spirit without sacrifice of selfish inclination and desire. We saw that the main body of the church {25} represents that portion of Christ's Church which is on earth, and that the nave suggests the idea of fellowship as the very spirit and law of the Christian life. Now the transepts, making the cross, tell us that fellowship expresses itself truly, that is, after Christ's example, through sacrifice. "A new commandment I give unto you, That ye love one another; as I have loved you, that ye also love one another." The true Christian life of loving fellowship, after the example of our Saviour who died upon the Cross for us, must get somehow, in self-denial for Christ and self-forgetful work for others, the sign of the Cross worked into it.