die with the body.

Self-knowledge has always been the theme of the Sages; and the
Upanishads deal especially with the knowledge of the Self and
also with the knowledge of God, because there is no difference
between the Self and God. They are one and the same. That which
comes out of the Infinite Whole must also be infinite; hence the
Self is infinite. That is the ocean, we are the drops. So long
as the drop remains separate from the ocean, it is small and
weak; but when it is one with the ocean, then it has all the
strength of the ocean. Similarly, so long as man believes
himself to be separate from the Whole, he is helpless; but when
he identifies himself with It, then he transcends all weakness
and partakes of Its omnipotent qualities.






Katha-Upanishad




The Katha-Upanishad is probably the most widely known of all the
Upanishads. It was early translated into Persian and through
this rendering first made its way into Europe. Later Raja Ram
Mohun Roy brought out an English version. It has since appeared
in various languages; and English, German and French writers are