35:56

Os Guinness, "How the church engages in a post-Christian culture." Rubicon

50:17

Dr. Os Guinness: "A Free People's Suicide"

58:20

Think Fast, Talk Smart: Communication Techniques

47:38

Os Guinness - Challenging the Darkness: Towards a New Christian Renaissance

31:08

Worldviews - How do you see the world and why? - Os Guinness - UNCOVER

1:12:12

A World Safe for Diversity: Os Guinness discusses religion and pluralism at Texas A&M | May 2012

43:39

"Origins of the Bible" - William Propp

1:27:19

Vocational Ministry Series - The Call: Finding and Fulfilling the Purpose of Your Life