A rational atheist, Isaac Asimov, and a religious, Ray Bradbury on religion.
Source:
1. Isaac Asimov with Charlie Rose, 1985
2. Ray Bradbury, Day at NightRay 1974
3. Asimov at 39, Richard D. Heffner, The Open Mind, 1988
4. A Conversation with Ray Bradbury, UCTV, 2001