The central message of this sermon is that Christians often fail to share the wealth and blessings they have received through their faith due to a lack of recognition or appreciation for these gifts, rather than any intentional decision to keep them secret. The teacher suggests that this failure stems from a focus on the world's attractions and stimulations, which can distract us from the true treasure we possess in Christ. As a result, the gospel's light is not shining as it should, and people are missing out on the good news of salvation. The takeaway for listeners is to cultivate an awareness of their spiritual blessings and to let them flow naturally into their relationships with others, rather than being choked by worldly worries or desires.