Have you ever thought of a right answer for a wrong question? Well , the only right answer for a wrong question is to make the person understand the question itself is wrong..!! So now think of it. . . Bhakti is relating to god with devotion and self knowledge is for ones own satisfaction. Then why should anyone teach?. No reason to teach. It is all up to the student to seek the knowledge.Guru is beyond any comparison because he/she doesn't see any problem but still has the compassion to teach the student to make them see the problem doesn't exists. Yes ,it looks contradictory but that is how it is. Until you understand the whole thing looks mystical.But in reality it is just an awakening to the truth.