Bhagavad Gita
          Translation by His Divine Grace
Bhaktivedanta Swami Prabhupad 
Chapter
Two : Contents of the Gita summarized  
Verses 25 to 28
| avyakto 'yam acintyo 'yam | It is said that the soul is invisible, inconceivable
  and immutable. Knowing this, you should not grieve for the body. | 
| atha cainam nitya-jatam   |  If, however, you
  think that the soul [or the symptoms of life] is always born and dies
  forever, you still have no reason to lament, O mighty-armed. | 
| jatasya hi dhruvo mrtyur   | One who has taken his birth is sure to die, and after
  death one is sure to take birth again. Therefore, in the unavoidable
  discharge of your duty, you should not lament. | 
| avyaktadini bhutani | All created beings are unmanifest in their beginning,
  manifest in their interim state, and unmanifest again when annihilated. So
  what need is there for lamentation? |