Will Durant
Notes
Will Durant (1885–1981), American historian and popular philosopher, author with his wife Ariel of the eleven-volume The Story of Civilization and of The Story of Philosophy (1926), which introduced several generations of readers to the subject. The line "we are what we repeatedly do; excellence, then, is not an act but a habit", usually attributed to Aristotle, is Durant's summary of Aristotle in that book, not Aristotle's own words.
Wikipedia: https://en.wikipedia.org/wiki/Will_Durant