If we could imagine such a man, that is a man who could invent the fly and send him out on his mission and furnish him with his orders: Depart into the uttermost corners of the earth and, diligently do your appointed work. Persecute the sick child, settle upon its eyes, its face, its hands, and gnaw and pester and sting, worry and fret and madden the worn and tried mother who watches by the child and humbly prays for mercy and relief with the pathetic faith of the deceived and the unteachable.
Mark TwainSuch is professional jealousy; a scientist will never show any kindness for a theory which he did not start himself. There is no feeling of brotherhood among these people. Indeed, they always resent it when I call them brother. To show how far their ungenerosity can carry them, I will state that I offered to let Prof. H--y publish my great theory as his own discovery; I even begged him to do it; I even proposed to print it myself as his theory. Instead of thanking me, he said that if I tried to fasten that theory on him he would sue me for slander.
Mark Twain