Think of a train track. You stand on the edge of one rail (toe line), the golf ball sits on the other rail (aiming line). Most golfers aim as if those two lines intersect out there somewhere. They don't.
Let's say you're aiming just below the pin, that's where you want the ball to land. Most golfers will turn their shoulders toward the pin or "aim at the pin." That is a guarantee you are going to be several feet or several yards on one side of the pin or the other.
Don't let the "rails" cross and you be cutting strokes in no time.
P.S. Thanks for your comments. Please feel free to ask any question about golf you want to. You'll get a quick answer!