Nearly six out of ten Christians either strongly agreed or somewhat agreed with the statement that Satan "is not a living being but is a symbol of evil," the survey found. Forty percent strongly agreed with the statement while 19 percent of American Christians somewhat agreed.

In contrast, about 35 percent of American Christians believe Satan is real. Twenty-six percent strongly disagreed with the statement that Satan is merely symbolic and about one-tenth (9 percent) somewhat disagreed. The remaining eight percent of American Christians responded they were unsure what to believe about the existence of Satan.

Likewise, most Christians in the United States do not believe that the Holy Spirit is a living force. Fifty-eight percent strongly or somewhat agreed with the statement that the Holy Spirit is "a symbol of God's power or presence but is not a living entity." Only one-third of Christians disagreed with the statement that the Holy Spirit is not just symbolic (9 percent disagreed somewhat, 25 percent disagreed strongly). Nine percent expressed they were unsure.

Interestingly, about half (49 percent) of those who agreed that the Holy Spirit is only a symbol but not a living entity, agreed that the Bible is totally accurate in all of the principles it teaches. The Bible states that the Holy Spirit is God's power or presence, not just symbolic.

Other survey findings include a significant number of self-described Christians believing that Jesus sinned when he lived on earth, contrary to the core teaching of Christianity that teaches the divinity and perfection of Jesus. More than one-fifth (22 percent) strongly agreed that Jesus Christ sinned when He lived on earth, with an additional 17 percent agreeing somewhat.