But the Apostle, in the immediately following words, goes on to pass beyond the bounds of his metaphor, and with complete indifference to the charge of mixing figures, speaks of the building as growing. That thought leads us into a higher region than that of effort. The process by which a great forest tree thickens its boles, expands the sweep of its branches and lifts them nearer the heavens, is very different from that by which a building rises slowly and toilsomely and with manifest incompleteness all the time, until the flag flies on the roof-tree. And if we had not this nobler thought of a possible advance by the increasing circulation within us of a mysterious life, there would be little gospel in a word which only enjoined effort as the condition of moral progress, and there would be little to choose between Paul and Plato. He goes on immediately to bring out more fully what he means by the growth of the building, when he says that if Christians are in Christ, they are 'built up for an habitation of God in the Spirit.' Union with Christ, and a consequent life in the Spirit, are sure to result in the growth of the individual soul and of the collective community. That divine Spirit dwells in and works through every believing soul, and while it is possible to grieve and to quench It, to resist and even to neutralise Its workings, these are the true sources of all our growth in grace and knowledge. The process of building may be and will be slow. Sometimes lurking enemies will pull down in a night what we have laboured at for many days. Often our hands will be slack and our hearts will droop. We shall often be tempted to think that our progress is so slow that it is doubtful if we have ever been on the foundation at all or have been building at all. But 'the Spirit helpeth our infirmities,' and the task is not ours alone but His in us. We have to recognise that effort is inseparable from building, but we have also to remember that growth depends on the free circulation of life, and that if we are, and abide in, Jesus, we cannot but be built 'for an habitation of God in the Spirit.' We may be sure that whatever may be the gaps and shortcomings in the structures that we rear here, none will be able to say of us at the last, 'This man began to build and was not able to finish.'