Beauty From Pain

Some days I wonder why God gives me pain.  Why He lets me walk through dark times.  My heart breaks at times and I beg Him to take away the aches that I feel, but He chooses to let them remain.

Why?

I don't mean why in an accusatory way.  I don't mean it in a "I'm mad and you make no sense" kind of way, either.  I'm asking "Why, God?  I don't understand, but I will trust You.  I will still love You.  I'm just so confused because I can't see what You are doing here."