The impermanent has no reality; reality lies in the eternal.  Those who have seen the boundary between these two have attained the end of all knowledge.  Realize that which pervades the universe and is indestructible; no power can affect this unchanging, imperishable reality.  The body is mortal, but that which dwells in the body is immortal and immeasurable.

Th physical body and the world of matter are impermanent.  They are illusion, not real.  A hologram.  That which is permanent and indestructible is spirit.  Spirit exists beyond the limits of time and space so it is immortal and immeasurable.