Something missing!

how do i start???! well.. hmmm.. yep! (enough of initial settings i think :p ).. i've felt this many times in my life so far.(by life i mean mostly since i joined engineering coz it was only then i had to choose between things. otherwise before that i had a definite goal for my life. i believe so! ).. coming back to the topic. i've strongly felt there is something missing. i wont be sure what it is. at times i feel i can do lots of things.even impossible. yet again at other times the same 'me' inside tells dont dream too big for expectations not met will lead to disappointment. hmmm.. but i feel it is best to believe in efforts. if not immediately, sometime in future the result is ensured. (no philosophy! my experience :) )... but what bugs my mind is, certain things are so sure that we can define how we want them to be. but some other things, we wil not have even a hint of what and how things are going to happen. how to receive such things? 'all is well' only if things happen the way we want or we expect them to. but ultimately, why dont things happen the way we want them to be????