Smith was raised in a Baptist household and attended a Catholic school. In a 2013 interview, he did not identify as religious; however, in 2015 Smith said in an interview with The Christian Post that his Christian faith, which was instilled in him by his grandmother, helped him to accurately portray his role as Bennet Omalu in Concussion saying, "She was my spiritual teacher, she was that grandmother at the church, the one having the kids doing the Easter presentations and putting on the Christmas plays and her kids and grandkids had to be first. She was the most spiritually certain person that I had ever met in my entire life. Even to the point that when she was dying she was happy, like she was really excited about going to heaven. " He is not a Scientologist and has denied rumors claiming him as a member of the Church of Scientology, but he has spoken favorably about it: "I just think a lot of the ideas in Scientology are brilliant and revolutionary and non-religious. "