the earlier stages of form are adapted to answer to these impulses. You may ask, why not give the man at once a mental body only, in which to work out his evolution, why must he struggle through the evolution of this body of sensation? Because, if he misses that stage, he will not be able to make up the links which are necessary for the continuity of his consciousness. At a later time the perfect man is conscious on all planes from Nirvâna downward to the physical, from the physical upwards to Nirvâna. On every plane in unbroken continuity of consciousness the Jîvanmukta lives and works. There is no link lacking. If, then, the man does not establish, in the building of his body of sensation, certain centres or, as they are called, chakras--that drawing into centres which is the work of the upward arc, as giving qualities is the work of the downward arc--if he does not draw the powers of sensation into definite centres in the sheath of his astral body, he will not have the links which he requires to receive impacts from the astral plane, and through which he can send out thrills of consciousness in order to impress it, rule it and guide it. That is why there is so much delay in the savage condition, where the life of sensation is supreme; these astral chakras are being builded up as centres of the senses, and they are built firm and strong; the outer organs, the eye, the ear, the nose, the tongue, the skin, these are merely the necessary organs in the physical body for the expression of consciousness through these chakras.