„Whenever I climb I am followed by a dog called ‘Ego’.“

— Friedrich Nietzsche

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„Like dogs in a wheel, birds in a cage, or squirrels in a chain, ambitious men still climb and climb, with great labor, and incessant anxiety, but never reach the top.“
— Robert Browning
„Perhaps I am not I even if my little dog knows me but anyway I like what I have and now it is today.“
— Gertrude Stein
„Mademoiselle,” I said, “it is sometimes difficult for a dog to find a scent, but once he has found it, nothing on earth will make him leave it! That is if he is a good dog! And I, mademoiselle, I, Hercule Poirot, am a very good dog.“
— Agatha Christie