Who removes landmark stones, bruises his fingers. [ Proverb ]

The rich are like beasts of burden, carrying treasure all day, and at the night of death unladen; they carry to their grave only the bruises and marks of their toil. [ St. Augustine ]

The human heart is like a millstone in a mill: when you put wheat under it, it turns and grinds and bruises the wheat to flour; if you put no wheat, it still grinds on, but then 'tis itself it grinds and wears away. [ Martin Luther ]

The human heart is like a millstone in a mill; when you put wheat under it, it turns and grinds, and bruises the wheat into flour; if you put no wheat in it, it still grinds on; but then it is itself it grinds, and slowly wears away. [ M. Luther ]