Q: If someone is preordained to do something...does this mean that they can still choose not to? Or will they just do it regardless? Also, are people preordained to do good things as well as bad? Or is it the same concept as destiny?
A: When speaking about this principle, I think "foreordained" is a better word to use when it comes to gaining a full understanding of the concept. I choose to stress the importance of the terms we use, because misunderstandings concerning the doctrine of foreordination have caused much confusion and disagreement among Christians in all ages, and even among members of The Church of Jesus Christ of Latter-day Saints. However, foreordination is a doctrine which must be understood and taught correctly (and in the proper context), because it concerns where we came from, and what our purpose was in coming here.
“The combined doctrine of God’s foreordination is one of the doctrinal roads “least traveled by.” Yet it clearly underlines how very long and how perfectly God has loved us and known us with our individual needs and capacities. Isolated from other doctrines, or mishandled, these truths can stoke the fires of fatalism, impact adversely upon agency, cause us to focus on status rather than service, and carry us over into predestination.
“Yet, though foreordination is a difficult doctrine, it has been given to us by the living God, through living prophets, for a purpose. It can actually increase our understanding of how crucial this mortal second estate is and can further encourage us in good works. This precious doctrine can also help us go the second mile because we are doubly called.” (Neal A. Maxwell, "A More Determined Discipleship," Ensign, Feb. 1979, lds.org).