text: Good men are mutually helpful; for each gives practice to the other's virtues and thus maintains wisdom at its proper level. Each needs someone with whom he may make comparisons and investigations. Skilled wrestlers are kept up to the mark by practice; a musician is stirred to action by one of equal proficiency. The wise man also needs to have his virtues kept in action; and as he prompts himself to do things, so is he prompted by another wise man. How can a wise man help another wise man? He can quicken his impulses, and point out to him opportunities for honourable action. Besides, he can develop some of his own ideas; he can impart what he has discovered. For even in the case of the wise man something will always remain to discover, something towards which his mind may make new ventures.