When I was fourteen years old, I was amazed at how unintelligent my father was. By the time I turned twenty-one, I was astounded how much he had learned in the last seven years.
I am aware that I am very old now; but I am also aware that I have never been so young as I am now, in spirit, since I was fourteen and entertained Jim Wolf with the wasps. I am only able to perceive that I am old by a mental process; I am altogether unable to feel old in spirit. It is a pity, too, for my lapses from gravity must surely often be a reproach to me. When I am in the company of very young people I always feel that I am one of them, and they probably privately resent it.
You see, he knew his own laws just as other people so often know the laws: by words, not by effects. They take a meaning, and get to be very vivid, when you come to apply them to yourself.