“Believe me,” she said, “I know what I am saying  where God has sent me, from underneath the umbrella of this church, throughout the state.”

Image Larry Kroon, pastor of Wasilla Bible Church, said most members were socially conservative because of their analysis of the Bible. Credit... Jim Wilson/The New York Times

Janet Kincaid, who has known Ms. Palin for about 15 years and worked with her on some Wasilla town boards and commissions when Ms. Palin was mayor here, said Ms. Palin’s spiritual path, from the Assembly of God to Wasilla Bible, has had a consistent theme.

“The churches that Sarah has attended all believe in a literal translation of the Bible,” Ms. Kincaid said. “Her principal ethical and moral beliefs stem from this.”

Prayer, and belief in its power, is another constant theme, Ms. Kincaid said, in what she has witnessed in Ms. Palin. “Her beliefs are firm in the power of prayer  let’s put it that way,” she said.

Maria Comella, a spokeswoman for the McCain-Palin campaign, said Ms. Palin had been baptized Roman Catholic as an infant, but declined to comment further.

“We’re not going to get into discussing her religion,” she said.

In the address at the Assembly of God Church here, Ms. Palin’s ease in talking about the intersection of faith and public life was clear. Among other things, she encouraged the group of young church leaders to pray that “God’s will” be done in bringing about the construction of a big pipeline in the state, and suggested her work as governor would be hampered “if the people of Alaska’s heart isn’t right with God.”

She also told the group that her eldest child, Track, would soon be deployed by the Army to Iraq, and that they should pray “that our national leaders are sending them out on a task that is from God, that’s what we have to make sure we are praying for, that there is a plan, and that plan is God’s plan.”