The words "thank you" are mighty easy to say when someone has done something wonderful for you. They also roll off the tongue pretty fast when we have been given a gift of any kind.
Have you ever said "thank you" to the Lord for placing you in difficult situations, even if they are for your own good? What if you were called to go through extreme—maybe even painful— circumstances to help you become more like Jesus? Would you say "thank you?" Have you ever said it to Him in the past?