Children that have been petted and waited upon, always expect it; and if their expectations are not met, they are disappointed and discouraged. This same disposition will be seen through their whole lives, and they will be helpless, leaning upon others for aid, expecting others to favor them and yield to them.
Disappointment is inevitable. But to become discouraged, there's a choice I make. God would never discourage me. He would always point me to himself to trust him. Therefore, my discouragement is from Satan. As you go through the emotions that we have, hostility is not from God, bitterness, unforgiveness, all of these are attacks from Satan.