All highly competent people continually search for ways to keep learning, growing, and improving. They do that by asking WHY. After all, the person who knows HOW will always have a job, but the person who knows WHY will always be the boss.
Benjamin FranklinIf anyone should doubt whether the electrical matter passes through the substance of bodies, or only over along their surfaces, a shock from an electrified large glass jar, taken through his own body, will probably convince him.
Benjamin Franklin