You mean you can win a chess game without taking any aggressive action?!?
It's quite possible. More often at least some aggressive action will be necessary of course, but that doesn't mean that the winning player can't have played a great defense (prophylaxis) for some or most of the game.

i try to go to attacking first by trying to control the center although its a little bit harder to do. i don't want to be on the defensive because i usually make sloppy moves.