Don't doubt just enjoy your lives that G-d gave us all and know that he WILL come back. Prophecy is exciting to keep up with because as with other things it give us hope. Hope many times keeps us going and if it's studying prophecy that keeps you going, then so be it, but don't let it get so deep that it in turn gets you down. Imagine all of the people, since Jesus was alive, that have studied the prophecy of The Bible and it gave them hope. Just prepare and look up and know that when Jesus returns it will be right on time!!