Excerpts below are from the 1896 publication "A Man's Value to Society", preface to Chapter 8 "The Enthusiasm of Friendship".
"He that walketh with wise men shall be wise" Solomon
"The only way to have a friend is to be one." Emerson
"A talent is perfected in solitude; a character in the stream of the world." Goethe
"It is certain that either wise bearing or ignorant carriage is caught as men take diseases, one of another; therefore let men take heed of their company." Shakespeare
"Beyond all wealth, honor or oven health, is the attachment we form to noble souls, because to become one with the good, generous and true, is to become, in a measure, good generous and true ourselves." Thomas Arnold
"Cicero said: 'Friendship can make riches splendid.' Friendship can plan many things for its wealth to execute. It can plan a good winter evening for a group, and it can plan an afternoon for a hundred children. It can roll in a Christmas log for a large hearth. It can spread happiness to the right and left. It can spend money most beautifully and make gold to shine. Civilization itself is of the heart." Shelby