Watchman Nee emphasizes the necessity of dividing the soul from the spirit to experience a deeper spiritual life. He outlines practical steps for believers, including recognizing the need for this division, actively seeking it, and submitting to God's will through prayer and the study of Scripture. Nee stresses the importance of taking a stand against sin and daily taking up the cross to facilitate this separation. By walking according to the Spirit and cooperating with the Holy Spirit, believers can achieve a pure and fruitful spiritual life, free from the mixture of soul and spirit. Ultimately, this process leads to a closer union with Christ and a life that bears much fruit.