chapter 2:13 of bhagavad gita says
"dehino asmin yatha dehe youvanam kaumaram jara tatha dehantra prapti deeras tatra na muhyate"
as the embodied soul takes a child body then youth then old age similarly it takes up another body after death the wise men is not deluded in this"
The wise by their clear aspect see death as birth is or see all events in life equally than worrying at death and gladdening at birth....
All must see all events in life equally or arjuna see death by wariors in war equally...dont become sad for they will take another birth naturally.
let gandiba dispell darkness in minds of seekers.