I hear and I forget. I see and I remember. I do and I understand.

My knowledge of electrical subjects was not acquired in a methodical manner but was picked up from such books as I could get hold of and from such experiments as I could make with my own hands.

We cannot learn men from books.

I hear, I know. I see, I remember. I do, I understand.

The truth is lived, not taught.

As a child, I wanted to know how things worked and to control them. With a friend, I built a number of complicated models that I could control.

Often the hands will solve a mystery that the intellect has struggled with in vain.