This book is a compilation of messages delivered in New York City in 1963 by Stephen Kaung, a long-time associate of Watchman Nee in China, on the theme of the ascent of the soul, portrayed in 15 Psalms that Kaung sees as rungs of a ladder. These fifteen Songs of Degrees are songs of ascents. They immortalize the spiritual experiences of ascents of the soul. In our seeking for union with God in life, we pass through different stages of growth such as purification, enlightenment and union. In each step, there are lessons to learn.