"They say that the knowable material world is only for the experience of the spirit. The point is that this whole world is for experience. The spirit within is Purusha or consciousness and Prakriti is the material world. The nature of Prakriti is explained in the two earlier Sutras viz. it has its own character and is made of 3 Gunas which are continuously active. Now what we have to do is experience, learn from our experience and go above the experience.