Why Do We Need To Share The Gospel?

In this episode, Dr. Betters answers the question, "Hombre asks "My question, why do we need to share or preach the gospel? We can just sit and wait because God has already chosen people to be his children, those chosen will soon come to church even without any person to share the gospel because God has already chosen them. Your effort could be just wasted if you keep on preaching or evangelizing the wrong person... unless if God will speak to you to whom you will preach his words, right?"