Many religious traditions can be described as "pluralist" or "universalist". That is, a belief that different religious belief systems can co-exist in society. This worldview accepts the concept that one's religion is not the sole and exclusive source of truth, and thus they acknowledge that at least some truths and true values exist in other religions. (adapted from Wikipedia)

By contrast, a few religions preach that there is only one path to God: their path. The Mormons are a prominent example of this point of view. For example in the Book of Mormon, 1 Nephi 14:10 reads:

And he said unto me: Behold there are save two churches only; the one is the church of the Lamb of God and the other is the church of the devil; wherefore whoso belongeth not to the church of the Lamb of God belongeth to that great church, which is the mother of aboninations; and she is the whore of all the earth.

The Mormons believe this because they also believe that their sacred texts - The Book of Mormon, The Pearl of Great Price, and The Doctrine and Covenants, are straight from God, word for word, and are therefore completely and divinely correct. By contrast, according to article 8 of their Articles of Faith, the Bible is correct only "insofar as it is correctly translated". In practice, they don't pay too much attention to the Bible.

Historical Note ...
You may wonder why the Mormons were driven out of Ohio, Missouri, Illinois and very nearly Utah too. What made the neighbors of these people reject them to the point of local warfare? The aggressive assertion that if you weren't Mormon, then you were a tool of Satan had a lot to do with it.

What do you believe? Is there just one true faith or can religious truth be found in many faiths? Vote in the poll.