The sermon addresses the critical issue of a wounded spirit, distinguishing it from physical health and the Holy Spirit. It outlines ten specific signs of spiritual injury, such as increased anger, hypersensitivity, and distrust, while providing fourteen practical steps for healing. The message emphasizes the necessity of walking in the Spirit, forgiving quickly, serving others, and avoiding negative influences to maintain spiritual vitality. Ultimately, it urges believers to protect their inner attitude from bitterness and despair to remain effective in their Christian walk.