How he is put into such different bodies is explained here. It is due to association with the different modes of nature. One has to rise, therefore, above the three material modes and become situated in the transcendental position. That is called Krsna consciousness. Unless one is situated in Krsna consciousness, his material consciousness will oblige him to transfer from one body to another because he has material desires since time immemorial. But he has to change that conception. That change can be effected only by hearing from authoritative sources. The best example is here: Arjuna is hearing the science of God from Krsna. The living entity, if he submits to this hearing process, will lose his long-cherished desire to dominate material nature, and gradually and proportionately, as he reduces his long desire to dominate, he comes to enjoy spiritual happiness. In a Vedic mantra it is said that as he becomes learned in association with the Supreme Personality of Godhead, he proportionately relishes his eternal blissful life.