Looking for a steady swing

A swing only lasts less than 2 seconds. So much work for such a short movement ! Whether you are a pro or an amateur, you have to work again and again, to check what goes wrong with a coach, with the video. You learn more and more things as you play or misplay, as you read magazines, books, as you watch videos or tournaments on TV. When you hit the ball you hope the result will be great. It sometimes happens; it is often a disappointment because perfection does not exist. The REAL thing with golf is that you can be a champion on one stroke, like Tiger Woods. You believe you have understood or felt something, at last. But the following stroke is a sort of disenchantment. This is what is so annoying with golf; understanding only lasts a few seconds. This is what makes it magic : its ephemeral side.