This 2004 interview with then State Senator Obama by Cathleen Falsani of the Chicago Sun Times is well worth reading:
So, I’m rooted in the Christian tradition. I believe that there are many paths to the same place, and that is a belief that there is a higher power, a belief that we are connected as a people. That there are values that transcend race or culture, that move us forward, and there’s an obligation for all of us individually as well as collectively to take responsibility to make those values lived.
And so, part of my project in life was probably to spend the first 40 years of my life figuring out what I did believe – I’m 42 now – and it’s not that I had it all completely worked out, but I’m spending a lot of time now trying to apply what I believe and trying to live up to those values.