Josh McDowell — American Writer born on August 17, 1939,

Joslin "Josh" McDowell is a Christian apologist, evangelist, and writer. He is within the Evangelical tradition of Protestant Christianity, and is the author or co-author of some 115 books. His best-known book is Evidence That Demands a Verdict, which was ranked 13th in Christianity Today '​s list of most influential evangelical books published after World War II. Other well-known titles are More Than a Carpenter, A Ready Defense and Right from Wrong... (wikipedia)

Here's the simplest answer: Within weeks, the disciples proclaimed the resurrection of Jesus Christ, that He had been bodily raised from the dead and appeared to them.
I would say 90 percent of Christians do not have a worldview, in other words a view of the world, based on the Scripture and a relationship with God.
Because the New Testament provides the primary historical source for information on the resurrection, many critics during the 19th century attacked the reliability of these biblical documents.
No matter how devastating our struggles, disappointments, and troubles are, they are only temporary. No matter what happens to you, no matter the depth of tragedy or pain you face, no matter how death stalks you and your loved ones, the Resurrection promises you a future of immeasurable good.
If Jesus Christ was who He claimed to be, and He did die on a cross at a point of time in history, then, for all history past and all history future it is relevant because that is the very focal point for forgiveness and redemption.