Watchman Nee emphasizes the necessity of maintaining a victorious spirit to resist the devil's attacks on our soul and body. He explains that spiritual weights can hinder our buoyancy and authority, urging believers to quickly recognize and surrender these burdens to the Lord. The struggle against the enemy is a wrestling match where we must stand firm in Christ, ensuring our spirit remains liberated and empowered by the Holy Spirit. When our spirit is triumphant, we gain clarity and discernment, while a shadowed spirit leads to confusion and deception. Ultimately, a pure and clear spirit allows us to follow God's will with ease.