Prabhupāda: Sanātana means eternal, without any end, without any beginning. But this nature, as we have, this body has got a beginning and it has end, similarly anything, this cosmic nature has a beginning and it has an end. So our this Kṛṣṇa consciousness movement is how to transfer our self to that nature, eternal nature.
Journalist: That's man's quest.
Prabhupāda: Yes. That is the quest. Everyone is trying to be happy because that is every living entity's prerogative. He is by nature to become happy but he does not know where to become happy. He's trying to become happy where four things are, miserable conditions are there, namely birth, death, disease, and old age. So many scientists, they are trying to become happy, to make people happy, but which scientist has tried to stop death, to stop old age, to stop disease? Has any scientist tried?