Life is sometimes hard. Things go wrong, in life and in love and in business and in friendship and in health and in all the other ways that life can go wrong. And when things get tough, this is what you should do.
Make. good. art.
I’m serious. Husband runs off with a politician? Make good art. Leg crushed and then eaten by mutated boa constrictor? Make good art. IRS on your trail? Make good art. Cat exploded? Make good art. Somebody on the Internet thinks what you do is stupid or evil or it’s all been done before? Make good art. Probably things will work out somehow, and eventually time will take the sting away, but that doesn’t matter. Do what only you do best. Make. good. art.
Make it on the good days too.

Neil Gaiman (b. 1960) British author, screenwriter, fabulist

Speech (2012-05-17), Commencement, University of the Arts, Philadelphia [10:08]
    (Source)

(Source (Video)). In the video, he starts it as "Sometimes life is hard." In the middle, he says it as, "Somebody on the Internet thinks what you're doing ..." He also adds "Make it on the bad days" before the final sentence.