Lucius Annaeus Seneca
Wisdom does not show itself so much in precept as in life - in firmness of mind and a mastery of appetite. It teaches us to do as well as to talk; and to make our words and actions all of a color.
When an author is too meticulous about his style, you may presume that his mind is frivolous and his content flimsy.
There is none made so great, but he may both need the help and service, and stand in fear of the power and unkindness, even of the meanest of mortals.