David Wilkerson emphasizes that God is searching for a faithful people who are willing to be refined and tested for His purpose. He illustrates this through the story of Gideon, where God reduced the number of soldiers from thousands to just 300, highlighting that He seeks those who are not fearful or doubting. The sermon stresses that God is not interested in numbers or outward appearances but in the quality of faith and readiness of His messengers. Wilkerson calls for believers to embrace the refining process, allowing God to shape them into effective tools for evangelism. Ultimately, the message is a call to trust God fully and be prepared for His work in the world.