"Pasteur himself was absolutely fearless. Anxious to secure a sample of saliva straight from the jaws of a rabid dog, I once saw him with the glass tube held between his lips draw a few drops of the deadly saliva from the mouth of a rabid bull-dog, held on the table by two assistants, their hands protected by leather gloves."

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Almost all men are over anxious. No sooner do they enter the world than they lose that taste for natural and simple pleasures so remarkable in early life. Every hour do they ask themselves what progress they have made in the pursuit of wealth or honor and on they go as their fathers went before them till weary and sick at heart they look back with a sigh of regret to the golden time of their childhood.

— Samuel Rogers