I have tried with all my heart

[W]hatever I have tried to do in life, I have tried with all my heart to do well; that whatever I have devoted myself to, I have devoted myself to completely; that in great aims and in small, I have always been thoroughly in earnest. I have never believed it possible that any natural or improved ability can claim immunity from the companionship of the steady, plain, hard-working qualities, and hope to gain its end. There is no such thing as such fulfilment on this earth. 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.

Charles Dickens, David Copperfield