The man who makes it his business to please the multitude is never done.

Michel de Montaigne (1533-1592) French essayist

The Autobiography of Michel de Montaigne, ch. 34 [ed. Marven Lowenthal (1935)]
    (Source)

Lowenthal created an "autobiography" from the wide array of first-person statements, experiences, and observations made by Montaigne across his essays, letters, etc. I have been unable to find from where this particular statement is translated or interpolated.