Watchman Nee emphasizes that in God's work, the character of the worker is paramount, even more so than the work itself. He explains that God prioritizes finding the right person over immediate results, investing time in shaping a workman whose character reflects Christ. This transformation involves shedding old habits and forming new ones through the cross, ensuring that the worker embodies key characteristics such as love, diligence, and self-control. Nee's teachings highlight that without the right character, God's work may suffer, making it crucial for workers to be spiritually prepared before engaging in sacred tasks.