This world is full of things that can get us feeling down. Thankfully, we never have to stay in that mindset; our purpose is so much bigger than the problems we struggle with! As long as we put our faith (all of our faith, not just a portion) in God's ability to use any situation we find ourselves in to bring Him glory, we are able to let go of our troubles.
If we are not willing, however, to place the outcome of our situations in God's hands, do we have any right to question Him when things don't go as we want?
Faith and prayer are amazing and miraculous gifts we're given, capable of producing unbelievable results... but only if we use them!