Sometimes it's hard to trust the bigger picture; to know that the piece you're working on right now fits into some bigger puzzle. Most of the time, I try so hard to make a piece fit in a space that I want it to and want to scream at God because it won't go.  Such a cheesy analogy, I know, but makes sense if you think about it!  We question why God won't let a piece fit when in reality we'd probably understand if only we could also know what the picture looks like when it's finished.  Only God knows the finished product and we just have to trust His placement until completion.