Watchman Nee emphasizes the tripartite nature of human beings, consisting of spirit, soul, and body, arguing that understanding this distinction is crucial for spiritual maturity. He explains that the soul is the meeting point of the spirit and body, and it is through the soul that individuals express their personality and make choices. Nee warns that failing to differentiate between the spirit and soul can lead to confusion in spiritual life, causing believers to mistake soulish experiences for spiritual ones. He illustrates the relationship between these three parts using the analogy of a temple, where the spirit represents the Holy of Holies, the soul the Holy Place, and the body the outer court. Ultimately, he calls for believers to allow their spirit to govern their entire being, aligning with God's intended order.