The interplay of the two by the aid of mind produces that which we call environment or circumstance. The general law, which produces cyclic effect, is the Law of Attraction and Repulsion, of which the subsidiary law is the Law of Periodicity, and of Rebirth. Cyclic evolution is entirely the result of the activity of matter, and of the Will or Spirit. It is produced by the interaction of active matter and molding Spirit. Every form holds hid a Life.
Every life constantly reaches out after the similar life latent in other forms.
When Spirit and matter sound the same note evolution will cease. When the note sounded by the form is stronger than that of Spirit, we have attraction between forms . When the note sounded by Spirit is stronger than that of matter and form, we have Spirit repelling form. The period of the domination of the form note is that of involution. The period of the repulsion of form by Spirit is that of the battlefield of the three worlds.