The work of the Holy Spirit in bringing people to saving faith should not be artificially separated from faithful apologetic engagement. Many Christians wrongly think that the ministry of the Holy Spirit is exclusively non-rational or even irrational. The Spirit is free to win and woe unbelievers in a host of ways—including dreams, angelic visitations, healings, visions, meaningful coincidences, and so on—but we must remember that He is “the Spirit of truth,” as Jesus said (John 16:13). There is no reason to separate the work of the Holy Spirit from rigorous and skillful argumentation for Christian truth. The Holy Spirit can set the redeemed mind free to argue logically and winsomely; he also reaches into the unbeliever’s soul through the force of arguments. Apologists should earnestly pray that the Holy Spirit will make them as intelligent and knowledgeable as possible. — Douglas Groothuis (from, A Christian Apologetics Manifesto)