In Scripture there are revealed mysteries so deep as to defy man's unaided reason. Unless God himself had revealed them, man would never have come to know them. But such is the conflict between the depths of these sublime mysteries and the merely human language that cloaks them that often it seems that Scripture is proposing for a our belief some impossibility. Our faith tells us that this cannot be so, but we might be tempted to think that the expression of these truths is not exact, nor what it should be. This again is not true; what is true, however, is that we have to use God-given reason to lay bare still more God's revelations. Then we see that God's revelation is in no way an impossibility and that Scripture's expression is exact. A striking example of this fact is furnished by the revealed doctrine of the indwelling of the Holy Spirit. There are many passages in Scripture where we find a revelation of this mystery. St Paul writing to the Romans says ‘But you live the life of the Spirit not of nature; that is, if the Spirit of God dwells in you.