Duane Litfin – former President of Wheaton College – wrote this article for Christianity Today. Here is a short sample for the article that reminds us that the power for evangelism is found in the gospel of Jesus, not us:
The gospel’s inherent power does not fluctuate with the strengths or weaknesses of its messengers.
This truth is humbling, but also immensely liberating. In the end, my inability to answer objections, my lack of training or experience, even failures in my own faithfulness in living it out do not nullify the gospel’s power. Its potency is due to the working of God’s Spirit.
Even when we are at our best, the gospel is powerful in spite of us, not because of us. Thanks be to God.