"When I was fourteen years old, I was……" — Mark Twain
"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."
"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."