There's a wonderful series entitled "The Theology and Metaphysics of the Gothic Cathedral" over at the New Liturgical Movements blog.
Br Lawrence Lew, O.P. writes:
"....This is to say that the symbol – and in this case we mean the Gothic cathedral – is not just an earthly reminder or signpost of heavenly realities, but rather it is the ‘en-fleshing’ in worldly matter of heavenly realities. As in the Incarnation the eternal Word communicated with humankind in the flesh, so God continues to communicate his truth to us through material signs and visible means. For, Von Simson argues, the medievals understood that “the physical world as we understand it has no reality except as a symbol… symbol is the only objectively valid definition of reality”. This metaphysical sensitivity characterizes the medieval artistic vision, so that the Gothic cathedral is not to be primarily understood in functional or socio-economic or aesthetic terms, but in metaphysical and theological terms, and one has to ask what truth the cathedral symbolizes; how does God communicate with us in its beauty and form? Hence, Von Simson says, “the medieval artist was committed to a truth that transcended human existence. Those who looked at his work judged it as an image of that truth”.
This strong symbolic sense, which is redolent of a Catholic understanding of sacramentals, the theology of the Incarnation, and the philosophical idea of participation, is central to any grasp of the Gothic cathedral and its architecture. I would argue that this was largely lost after the Reformation, and it needs to be re-discovered. For a church is not built just as a theatre for the sacred drama of Liturgy, nor merely as a badge of our cultural identity, nor even as a didactic 'worship space', but it is, as the medievals saw it, a transformation of space and matter so that the church building makes visible and truly communicated in its very physical form the metaphysical reality of redeemed Creation, which is sacramentally made visible in God's holy Church.
What if our lives are like cathedrals?
1 Cor. 6:12- 20
"I have the right to do anything," you say—but not everything is beneficial. "I have the right to do anything"—but I will not be mastered by anything. You say, "Food for the stomach and the stomach for food, and God will destroy them both." The body, however, is not meant for sexual immorality but for the Lord, and the Lord for the body. By his power God raised the Lord from the dead, and he will raise us also. Do you not know that your bodies are members of Christ himself? Shall I then take the members of Christ and unite them with a prostitute? Never! Do you not know that he who unites himself with a prostitute is one with her in body? For it is said, "The two will become one flesh." But whoever is united with the Lord is one with him in spirit. Flee from sexual immorality. All other sins people commit are outside their bodies, but those who sin sexually sin against their own bodies. Do you not know that your bodies are temples of the Holy Spirit, who is in you, whom you have received from God? You are not your own; you were bought at a price. Therefore honor God with your bodies.