"Oh, the shark has pretty teeth, dear, And he shows them pearly white. Just a jackknife has Macheath, dear, And he keeps them out of sight."

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[T]omorrow is a new day. You shall begin it well & serenely, & with too high a spirit to be cumbered with your old nonsense. This day ... is too dear with its hopes & invitations to waste a moment on the rotten yesterdays.

— Ralph Waldo Emerson