The end of the club is hidden by the hands but here is a visual drill that can help the golfer see and feel where the shaft should align to create consistent strikes on the ball.
The golf club only stays on the target line for a short amount of time. It does however need to enter and exit in a manner that will spit the ball out straight and eliminate curvature. Here is a visual to how it works.
I have always talked about the similarity of baseball and golf motions. The only difference is the ball sits or is thrown in a different area relative to the ground level.
The end of the club is hidden by the hands but here is a visual drill that can help the golfer see and feel where the shaft should align to create consistent strikes on the ball. 
How do consistent ballstrikers get the clubhead to enter the ground at the precise point that allows pure contact. Watch and learn.
The golf club only stays on the target line for a short amount of time. It does however need to enter and exit in a manner that will spit the ball out straight and eliminate curvature. Here is a visual to how it works.
Shaft lean is one of the most discussed aspects of gaining a better strike on the ball. But what is it really? And how is it achieved?
I have always talked about the similarity of baseball and golf motions. The only difference is the ball sits or is thrown in a different area relative to the ground level.
Does the club have to face directly towards the target at the end of the backswing? No, it doesn't. There are many options that can work.