Ravi on How do you know there is a God?

Ravi Zacharias From Wikipedia,

 Ravi Kumar Zacharias (born 1946) is an Indian-born, Canadian-American evangelical Christian apologist and evangelist. Zacharias is the author of numerous Christian books, including Gold Medallion Book Award winner Can Man Live Without God? and bestsellers Light in the Shadow of Jihad and The Grand Weaver. He is the founder and chairman of the board of Ravi Zacharias International Ministries, host of the radio programs Let My People Think and Just Thinking (heard weekly and daily, respectively, on Christian stations across the U.S.), and visiting professor at Wycliffe Hall of Oxford, where he teaches apologetics and evangelism. Previously, Zacharias studied as a visiting scholar at Cambridge University and held the chair in Evangelism and Contemporary Thought at Alliance Theological Seminary from 1981 to 1984.Commentator Chuck Colson referred to Zacharias as "the great apologist of our time."