We believe that truth can be found in many places - good books, science, and even other religions. When we call ourselves the one true church, it means that we believe that we are the only church with the whole truth of the restored gospel, as preached by Jesus Christ during His ministry on Earth.
We don't just look to our own people for truth and understanding though. I've heard C. S. Lewis quoted in General Conference, and we're encouraged to get an education as well study our own faith for ourselves and come to our own testimony. I've personally read various Eastern philosophies and I love talking to Muslim, Catholic, or even non-religious friends. Truth comes from all sorts of sources.
And sometimes it's nice when something from my own faith is quoted outside of that context. The school I work at is an Islamic school, and just this week I noticed that Gordon B. Hinckley, a former prophet and President of our church, is quoted on an inspirational note in the hall.
Truth is truth, no matter its source.