Pastor Rick Warren continues to push members of his Saddleback Church campuses in Southern California and more than 6,200 other churches globally toward improved biblical literacy as his 40 Days in the Word campaign winds down this week.

In addition to being able to access daily video devotions from 40 pastors recruited by Warren to contribute their teaching to the study, those who have registered online can also receive encouragement from his email devotions. This week, Warren wrote that the "Bible's cohesiveness proves it true."

"Only God could have put the Bible together. It is 66 books written over 1,600 years by 40 different authors - and it has one theme," Warren stated. "It is one of the reasons we know that the Bible is God's Word: It has a single unified theme. From Genesis to Revelation, the Bible is all about God redeeming man. Jesus is its star."

The best-selling author of The Purpose Driven Life, launched the 40-day study during worship services of the third weekend in January by preaching that the Bible is not only historically and prophetically accurate, but scientifically trustworthy as well.

"The fact that the Bible has only one theme is nothing short of a miracle. It'd be one thing if one person wrote the Bible. The Koran was written by one person, Mohammed. The Analects of Confucius were written by Confucius. The writings of Buddha were written by Buddha. You'd expect them to be uniform," wrote Warren in his devotion.

"The pictures, metaphors, analogies, and illusions - from beginning to end - are about God's plan to redeem people and build a family for eternity. It all began with him. You can see him in every book.