Apologetics is the seasoning, the gospel is the main course. You do not want too much of the seasoning or it will make the main course insipid. Support the argument justifiably, but it is Christ that you need to lift up, an it is the Holy Spirit that brings about the change within the human heart. And in the summand it is the Spirit and the word that come together to bring conviction. An argument may remove the doubt, it is only the Holy Spirit who can convict of truth. - Ravi Zacharias