Another Dilemma

Do you often question if your life is already planned for you? Do you ever ask yourself why bother working hard if your life is already set? Recently, I have been asking these questions due to a combination of being a second-semester senior and less school work. As relaxing as it may feel right now, I know, for a fact, that being lazy will get me no where - trust me, I tried it. But then again, coming home from school, sleeping until 7 or 8 o'clock beats the hell out of doing homework and studying. This is pretty much my life right now: sleep a lot, eat a lot, do very little. I hate to admit it, but it feels very nice.
Sometimes I convince myself that someone has already planned out my life. I often pray that he would take care of my future, and I certainly believe that he will. Considering how much I trust him, it is very tempting to set up the cruise control and roll along. But given how I feel about this whole dilemma, I have come to a conclusion. He only rewards those who work hard - I think that's what he said. In the past few days, I was rewarded with some college acceptance letters. But at the same time I'm scared that if I stop working hard, I won't get anymore acceptance letters.
However, this conflicts with my other belief that my life is already planned out. I guess that this depends on my definition of a "successful" life. So I have decided that I will stop being lazy and start putting some effort back into my school work. Therefore, I won't feel as bad and maybe some more good news will arrive.