What is the reasoning behind the Amish practice of avoiding technological advances?

The Amish seem to believe that it is somehow wrong to utilize technological advances, such as the automobile, electricity, etc. What is the basis for this belief (among those that do this for spiritual reasons)? Put another way, what is the problem or danger with technological advances? How does avoiding them make someone more spiritual. *I guess I should not expect an answer from a member of the Amish, but perhaps someone who is familiar with that teaching can answer.*