Some Ado About Melancholy

[From Much Ado About Nothing, by William Shakespeare, I.3]

    There is no measure in the occasion that breeds;
    therefore the sadness is without limit.[...]
    I wonder that thou, being, as thou sayest thou art,
    born under Saturn, goest about to apply a moral
    medicine to a mortifying mischief. I cannot hide
    what I am: I must be sad when I have cause and smile
    at no man's jests, eat when I have stomach and wait
    for no man's leisure, sleep when I am drowsy and
    tend on no man's business, laugh when I am merry and
    claw no man in his humour.[...]
    I had rather be a canker in a hedge than a rose in
    his grace, and it better fits my blood to be
    disdained of all than to fashion a carriage to rob
    love from any: in this, though I cannot be said to
    be a flattering honest man, it must not be denied
    but I am a plain-dealing villain. I am trusted with
    a muzzle and enfranchised with a clog; therefore I
    have decreed not to sing in my cage. If I had my
    mouth, I would bite; if I had my liberty, I would do
    my liking: in the meantime let me be that I am and
    seek not to alter me.

-Don John