I don't know about believing in it, but he's big on the meditation part and loosely uses atheism...the "by definition" type. I think very highly of Buddhism though, it lacks the bloodiness of Christianity and Islam, it's done a lot more positives than negatives unlike ones like those 2. And Buddha's teachings are what I like to live by, it's the same thing really Jesus taught, but promotes free-thought and free-will - perfect combination.