You are old Father William,' the young man said, 'and your hair has become very white; and yet you incessantly stand on your head-do you think, at your age, it is right?
Lewis CarrollWhen I come upon anything-in Logic or in any other hard subject-that entirely puzzles me, I find it a capital plan to talk it over, aloud, even when I am all alone. One can explain things so clearly to one's self! And then, you know, one is so patient with one's self: one never gets irritated at one's own stupidity!
Lewis Carroll