“Some happy talent, and some fortunate opportunity, may form the two sides of the ladder on which some men mount, but the rounds of that ladder must be made of stuff to stand wear and tear; and there is no substitute for thorough-going, ardent, and sincere earnestness. Never to put one hand to anything, on which I could throw my whole self; and never to affect depreciation of my work, whatever it was; I find, now, to have been my golden rules.”