Old friends become bitter enemies on a sudden for toys and small offenses. — Robert Burton. English scholar and author (1577–1640)
Hence it is clear how much more cruel the pen is than the sword. (Hinc Gham Sit Calmus Saevior Ense Patet)
Like dogs in a wheel, birds in a cage, or squirrels in a chain, ambitious men still climb and climb, with great labor, and incessant anxiety, but never reach the top.