I started learning swimming in my early 40s. Apart from swimming, the training process taught me quite a few lessons for life.
Swimming is one physical activity which cannot be taught by a physical instructor. It requires actuating your mental faculty as well-- body and mind together make you swim.
In very convention sense, teacher shows you how to acquire certain skills or knowledge. You follow him/her and in a few efforts, you acquire what you had intended to. Teaching is over and improvement on newly acquired knowledge/skill...