Well-known Christian apologist Dinesh D'Souza visited a California megachurch on Sunday to equip believers with tools other than "Let me tell you what Jesus has done for me."

While experiential Christianity is a valuable form of testimony, the experience is largely personal and unique, he said, and does little when trying to give a defense of the faith.

D'Souza was invited to address thousands at Harvest Christian Fellowship in Riverside, Calif., to share the "what" of evangelism. Lead Pastor Greg Laurie is leading the megachurch in a series of messages on sharing one's faith in preparation for the annual Harvest Crusade in Southern California in August.

Just a week before D'Souza's appearance, Laurie stressed to his congregation that God can use everyone to preach the Gospel. God even used "a knucklehead like me," he said, as he recalled his teen years when he had become a new believer and was still able to bring a middle-aged woman to faith in Jesus Christ.

While being a scholar isn't a prerequisite to sharing one's faith, Harvest congregants were introduced to apologetics over the weekend to address some of the difficult questions Christians come across when evangelizing.

Apologetics, D'Souza explained, refers to using reason to give a defense of the faith. "Using reason means not using revelation, not using an appeal to the Bible and in some ways ... not just appealing to your own experience."

Apologetics is different in every generation, he noted. While apologists such as C.S. Lewis had to deal with questions raised in the aftermath of World War II and the Holocaust, the world today is very different, as are the questions.

"There's always a need for a new breed of young Christian defenders who are able to respond to the challenges of their own time and stand up for the faith," said D'Souza, who most recently authored Life After Death: The Evidence.

Addressing a common atheist argument that Christians have blind faith and throw their brains out the window when it comes to belief in God, D'Souza told the Harvest congregation that not all answers can be fully resolved by reason. There are questions where you can never get a full answer no matter how much you apply reason, he said.

Before marrying, he tried to approach the issue of marriage with reason, pondering what life would be like with his now wife over the next 50 years. No matter how much he pondered, he would never really know, he realized. Even if he decided to try to get to know her more for a few more years, he still ultimately would not have all the data and be able to predict what married life would be like.

"You can't really wait for the data to come in. So in life, at some point, you got to go for it," he said. "You've got to make a decision even in the absence of full information.

And in that sense, "faith is not unreasonable," he added. "It is the reasonable step, having plugged in reasons but now recognizing that reason cannot take you all the way."

D'Souza has debated leading atheists including Christopher Hitchens, whom he has known for 20 years, and Daniel Dennett. Hitchens was recently diagnosed with cancer of the esophagus and will undergo chemotherapy.

On an interesting note, D'Souza noted that atheists and nonbelievers are "closer to the Christian" than those who are indifferent. The opposite of belief is indifference, not unbelief, he said. The nonbeliever is engaged in the issue and sees the importance of it. The stakes are very high for such a person and if there is a God it changes a lot.