The point about immortality is again being driven home here. For the teacher to merely impart perfect knowledge is not enough; for that knowledge to be useful, it must sink deep into the heart of the student. Hence a skillful teacher often repeats a point previously made. In Sanskrit literature, this is called
punarukti
, or “repetition.” Shree Krishna has often used
punarukti
, as a tool in the
Bhagavad Gita
for stressing the important spiritual principles to ensure that they are grasped deeply by his student.