The main feature should be the teaching of principles through stories. Don't make it metaphysical at all.
Swami VivekanandaEvery idea that strengthens you must be taken up and every thought that weakens you must be rejected.
Swami VivekanandaIf you intend to study the mind, you must have systematic training; you must practice to bring the mind under your control, to attain to that consciousness from which you will be able to study the mind and remain unmoved by any of its wild gyrations. Otherwise the facts observed will not be reliable; they will not apply to all people and therefore will not be truly facts or data at all.
Swami VivekanandaThe power of meditation gets us everything. If you want to get power over nature, [you can have it through meditation]. It is through the power of meditation all scientific facts are discovered today. They study the subject and forget everything, their own identity and everything, and then the great fact comes like a flash.
Swami Vivekananda