Sourced

• He that walketh with wise men shall be wise, but a companion of fools shall be destroyed.
  • Proverbs 13:20

• Be not deceived: evil communications corrupt good manners.
  • 1 Corinthians 15:20

Unsourced

• It is best to be with those in time that we hope to be with in eternity.
  • Thomas Fuller

• Keep good company, and you shall be of the number.
  • George Herbert

• If men wish to be held in esteem, they must associate with those only who are estimable.
  • Jean de La Bruyère

• He who comes from the kitchen smells of its smoke; he who adheres to a sect has something of its cant; the college air pursues the student, and dry inhumanity him who herds with literary pedants.
  • Johann Kaspar Lavater

• Be very circumspect in the choice of thy company. In the society of thine equals thou shalt enjoy more pleasure; in the society of thy superiors thou shalt find more profit. To be the best in the company is the way to grow worse; the best means to grow better is to be the worst there.
  • Francis Quarles

• Choose the company of your superiors whenever you can have it.
  • Philip Stanhope, 4th Earl of Chesterfield

• I set it down as a maxim, that it is good for a man to live where he can meet his betters, intellectual and social.
  • William Makepeace Thackeray

Anonymous

• If you always live with those who are lame, you will yourself learn to limp.
  • Latin proverb