A man is sometimes a coloured and sometimes a clear medium for the energies he exerts. When a thought conveyed or a work done enters alone into the observer’s experience, no friendship is possible. This is always the case when the master is dead; for if his reconstructed personality retains any charm, it is only as an explanation or conceived nexus for the work he performed. In a philosopher or artist, too, personality is merely instrumental, for, although in a sense pervasive, a creative personality evaporates into its expression, and whatever part of it may not have been translated into ideas is completely negligible from the public point of view. That portion of a man’s soul which he has not alienated and objectified is open only to those who know him otherwise than by his works and do not estimate him by his public attributions. Such persons are his friends. Into their lives he has entered not merely through an idea with which his name may be associated, nor through the fame of some feat he may have performed, but by awakening an inexpressible animal sympathy, by the contagion of emotions felt before the same objects. Estimation has been partly arrested at its medium and personal relations have added their homely accent to universal discourse. Friendship might thus be called ideal sympathy refracted by a human medium, or comradeship and sensuous affinity colouring a spiritual light. [Sidenote: The medium must also be transparent.] If we approach friendship from above and compare it with more ideal loyalties, its characteristic is its animal warmth and its basis in chance conjunctions; if we approach it from below and contrast it with mere comradeship or liking, its essence seems to be the presence of common ideal interests. That is a silly and effeminate friendship in which the parties are always thinking of the friendship itself and of how each stands in the other’s eyes; a sentimental fancy of that sort, in which nothing tangible or ulterior brings people together, is rather a feeble form of love than properly a friendship. In extreme youth such a weakness may perhaps indicate capacity for friendship of a nobler type, because when taste and knowledge have not yet taken shape, the only way, often, in which ideal interests can herald themselves is in the guise of some imagined union from which it is vaguely felt they might be developed, just as in love sexual and social instincts mask themselves in an unreasoning obsession, or as for mystic devotion every ideal masks itself in God. All these sentimental feelings are at any rate mere preludes, but preludes in fortunate cases to more discriminating and solid interests, which such a tremulous overture may possibly pitch on a higher key. [Sidenote: Common interests indispensable.]