'God made bodies and material things because when they are rightly seen and rightly used, God's glory is more fully known and displayed. The heavens are telling the glory of God (Ps.19:1). That's why the physical universe exists. Consider the birds of the air and the lilies of the field, and you will know more of God's goodness and care (Matt.6:26-28). See in the things he has made his invisible attributes - his eternal power and divine nature (Rom.1:20). Look at marriage and see Christ and the church (Eph.5:23-25). As often as you eat this bread and drink this cup, you declare the Lord's death until he comes (1 Cor.11:26). Whether you eat or drink or whatever you do, do all to the glory of God (1 Cor.10:31). The material world is not an end in itself; it is designed to display God's glory and to awaken our hearts to know him and value him more.'
John Piper, This Momentary Marriage, p.119.