In this present volume, Watchman Nee shows us that at the source of all spiritual things stands the cross. In order that Christ may be all and in all, there is no effective means save the cross. How we therefore need to pray, 'Search me, O God, and know my heart: try me and know my thoughts' (Psalm 139.23), so that by God's response to such heartfelt prayer we may have a true knowledge of our selves. Now such response will mean our having to experience the dividing of our spirit and soul, since the root of all sins is the falle n self life of man. Yet, as the author makes clear, with the self thus dealt with, we can then be true messengers of the cross.