The aims of this paper are to deduce the meanings of ”philia” in Aristotle's (Nicomachean Ethics) and analyze the foundation and its disputes of ”philia as a virtue”. This paper discovers that self-love based on reason is to love his/her own reason, which is the foundation of philia and also the energy of pursuing happiness. Aristotle's concept of philia is intensely related to realizing the conduct. Meanwhile, this paper advocates regarding Aristotle's Ethics with the viewpoint of pedagogy, which would surmount the disputes on the foundation of philia, and furthermore, in this way, inspirations for education emerge from Aristotle's Ethics.