Henry David Thoreau on youth

I have learned, that if one advances confidently in the direction of his dreams, and endeavors to live the life he has imagined, he will meet with a success unexpected in common hours.

To be a philosopher is not merely to have subtle thoughts; but so to love wisdom as to live according to its dictates.

We must walk consciously only part way toward our goal, and then leap in the dark to our success.

When I was a boy of 14, my father was so ignorant I could hardly stand to have the old man around.
But when I got to be 21, I was astonished at how much the old man had learned in seven years.

George Washington, as a boy, was ignorant of the commonest accomplishments of youth. He could not even lie.

Mark Twain1835–1910“Brief Biographical Sketch of George Washington”, The Celebrated Jumping Frog of Calaveras County, and Other Sketches (1867), ed. John Paul

When I was younger I could remember anything, whether it happened or not.

Mark Twain1835–1910Autobiography of Mark Twain, Mark Twain Project edition, Volume 1 (2010), p. 210