The central message of this sermon is that human effort and striving for salvation ultimately exhaust themselves and must surrender to God's power and grace in order to be saved. The speaker uses various examples, including Samson's story and the analogy of Naim Suleimanelu, the greatest weightlifter in history, to illustrate how human endeavor can only take one so far before it reaches a point of exhaustion, at which point God's salvation can manifest itself. This idea advances the belief that salvation is not something that humans can attain through their own efforts or striving, but rather it is a gift from God that is revealed when humanity has exhausted all its resources and abilities. The takeaway the teacher wants the listener to understand is that surrendering to God's power and grace is essential for true salvation, and that human effort must ultimately give way to divine intervention in order for salvation to be realized.