It’s been argued that friendship is a greater gift than romantic love (though it’s not uncommon for one to turn abruptly into the other), but whatever the case, friendship is certainly one of the most rewarding fruits of life from the sweetness of childhood friendships to the trickiness of workplace ones. This delicate dance has been examined by thinkers from Aristotle to Francis Bacon to Thoreau, but none more thoughtfully than by Ralph Waldo Emerson. In an essay on the subject, found in his altogether soul-expanding Essays and Lectures (public library; free download), Emerson considers the intricate dynamics of friendship, beginning with our often underutilized innate capacities: We have a great deal more kindness than is ever spoken. Barring all the selfishness that chills like east winds the world, the whole human family is bathed with an element of love like a fine ether… The emotions of benevolence … from the highest degree of passionate love, to the lowest degree of good will, they make the sweetness of life. What is so delicious as a just and firm encounter of two, in a thought, in a feeling? How beautiful, on their approach to this beating heart, the steps and forms of the gifted and the true! The moment we indulge our affections, the earth is metamorphosed; there is no winter, and no night; all tragedies, all ennuis vanish; all duties even; nothing fills the proceeding eternity but the forms all radiant of beloved persons. Let the soul be assured that somewhere in the universe it should rejoin its friend, and it would be content and cheerful alone for a thousand years. Emerson goes on to consider the two essential conditions of friendship: There are two elements that go to the composition of friendship, each so sovereign, that I can detect no superiority in either, no reason why either should be first named. One is Truth. A friend is a person with whom I may be sincere. Before him, I may think aloud. I am arrived at last in the presence of a man so real and equal that I may drop even those undermost garments of dissimulation, courtesy, and second thought, which men never put off, and may deal with him with the simplicity and wholeness, with which one chemical atom meets another. Sincerity is the luxury allowed, but diadems and authority, only to the highest rank, that being permitted to speak truth as having none above it to court or conform unto. Every man alone is sincere. At the entrance of a second person, hypocrisy begins… We cover up our thought from him under a hundred folds. The other element of friendship is tenderness. We are holden to men by every sort of tie, by blood, by pride, by fear, by hope, by lucre, by lust, by hate, by admiration, by every circumstance and badge and trifle, but we can scarce believe that so much character can subsist in another as to draw us by love. Can another be so blessed, and we so pure, that we can offer him tenderness? When a man becomes dear to me, I have touched the goal of fortune.