I had this one guy whom was very intelligent and for the life of his, he could not get rid of the hundreds of swing thoughts he had gathered from all sources when he stood over the golf ball. He will have a bad contact then turned around asking me questions and what did I see in his swing........ many, many questions and answers later , I realized his problem is not with understanding the golf swing but the execution of the golf swing.
Granted, not everyone could swing like a professional, most of us never will be. But there is a way to make this guy enjoy his golfing a lot more.
I finally told him to focus on just a several swing thought when before and during addressing the gold ball.
Which are - alignment ( target line and most importantly the club face to the target line and the ball position ). -check his grip ( he had a way too strong a grip on the golf club which inhibit him from a full release at follow through) then - at the top try not to be stretching to achieve the parallel ( he stretch too hard and tighten up his upper body with tight shoulders, tensed arms which did the reverse of the goal of winding up, which made his coming down inconsistent at the golf ball ).
He could not remember this in a simple way before he grooved the routine, so I got him to think of this from the ground up. alignment the club ( soling correctly with irons ) , check grip and not to stretch too much at the top.
Simple enough to just look at the club face , check his grip and not to over stretch at the top.
He still ask me questions after all this and could not pull the trigger ( standing over the golf ball from 5-13 seconds looking at the golf ball - frozen ). So we got him to trust himself after checking the alignment , the grip, and just swing away. We told him ALL THE WORK HAD BEEN DONE WITH THE ALIGNMENT AND THE GRIP, no more thoughts but to go after the golf ball with a full follow through.
He was very happy after that, and we told him he had it in him before, just not bringing the potential out as he could /should.
Since then, I had correct his grip many times in the first year, each time I see him, somehow he'd slip back to the old way too strong a golf grip. He said he was not confident to keep the new grip on the golf course, yet so he went back to the comfort grip he had been using for decade.
We had to convince him the feel for a change is not going to feel comfortable until he had a chance to groove it into his comfort zone. As he is not injuring himself and seeing good results, he should keep at it .