Here is a lecture by SSS Harbhajan Singh Khalsa, from Gurdwara on June 18th 1989, on the topic of God and Religion.
[Audio:http://www.mrsikhnet.com/mp3player/educational/siri%20singh%20sahib/Siri%20Singh%20Sahib%20-%20One%20God%20-%20Jun%2018%201989.mp3] Download
Powerful!!
Well put..Dhan Dhan Guru Ram Das