I have my doubts about his timing and sincerity, but here is some of what he has to say about his faith.
Here he talks about being a devout Christian:
I am a Christian, and I am a devout Christian. I believe in the redemptive death and resurrection of Jesus Christ. I believe that that faith gives me a path to be cleansed of sin and have eternal life. But most importantly, I believe in the example that Jesus set by feeding the hungry and healing the sick and always prioritizing the least of these over the powerful. I didn’t ‘fall out in church’ as they say, but there was a very strong awakening in me of the importance of these issues in my life. I didn’t want to walk alone on this journey. Accepting Jesus Christ in my life has been a powerful guide for my conduct and my values and my ideals.
. . .
http://www.truthdig.com/eartotheground/item/20080306_news_flash_obama_clinton_claim_christian_faith/Here he discusses embracing certain parts of the Bible and the death and resurrection of Jesus:
Well, look, obviously as a Christian I believe in the values that are laid out in Scripture. I reflect on them often. I reflect on the lessons of Scripture as I’m going through the day. I pray frequently. I wrestle with doubts and try to figure out whether I’m doing the right thing, am I operating in an honest and moral way that is true to my religious precepts? Sometimes I may falter. So I guess the point is, I approach my work or I guess my faith is part of everything that I do. And I don’t think there’s a clear separation between my faith and how I try to live my life. And I certainly think that part of my motivation in the work that I do is a belief in what I consider the core precept of Christianity in addition to Christ dying for your sins and that is treating your brothers and sisters as you would have them treat you. A sense of empathy and a belief in the golden rule. And that’s what I try to apply to my work and what I do every day.
http://www.jewishjournal.com/thegodblog/item/christianity_and_politics_obama_explains_christ_paid_price_for_sin_20080603/Here he talks about being called by God:
"The questions I had did not magically disappear," Obama wrote in his recent book, titled "The Audacity of Hope" after Wright's turn of phrase, of the day four years later when he made a formal commitment of Christian faith. "But kneeling beneath that cross on the South Side of Chicago, I felt God's spirit beckoning me. I submitted myself to His will, and dedicated myself to discovering His truth."
http://www.csmonitor.com/2007/0716/p01s01-uspo.htmlHere he talks about doing God's will:
Explaining what it meant to him to be a Christian, the Democratic senator from Illinois talked of "walking humbly with our God": "I know that I don't walk alone, and I know that if I can get myself out of the way, that I can maybe carry out in some small way what he intends."
http://www.chicagotribune.com/news/chi-saddleback-obama-mccainaug17,0,4760268.storyHere he uses his faith to try and get votes in South Carolina, calling himself a "committed Christian":
Today, Greg Sargent posted a brochure which the Obama campaign is distributing in South Carolina which seem to include religious appeals at least as overt and explicit as anything Huckabee has done. The center page of the brochure proclaims -- in the largest letters on the page -- that Obama is a "COMMITTED CHRISTIAN," and includes three pictures of Obama, all of which show him praying or preaching in a Church, and also includes a fourth picture: of the interior of a Church with a large cross lurking in the background. The page also says that Obama is "guided by his Christian faith" and quotes Obama saying: "We do what we do because God is with us."
That same page prints Obama's views "on the power of prayer," and -- using the same language George Bush has frequently used as a signifier to evangelical voters -- says that Obama is "Called to Christ," "Called to Bring Change" and "Called to Serve":
Similarly, the front page of the brochure shows Obama in a chin-on-hand contemplative posture and underneath, it reads: "Answering the Call." The last page shows two more pictures of Obama in Church, proclaims him again in large letters to be a "COMMITTED CHRISTIAN," and describes how he "felt a beckoning and accepted Jesus Christ into [his] life":
Sargent speculates that the brochure is an attempt to counter the false whispering campaign increasingly being circulated in South Carolina (by whom, we should find out) that Obama is a Muslim. That very well may be, but the brochure seems designed with a far broader purpose: namely, to signify to South Carolina's many Christian voters that Obama is one of them and therefore should have their vote for President, much the way that Huckabee sought to court the evangelical vote that was so critical to the GOP Iowa caucus.
http://www.salon.com/opinion/greenwald/2008/01/21/obama/