Unless there is spiritual education, unless one is spiritually enlightened, you have to undergo the process of birth, death, old age and disease. You may talk very highly and foolishly, but the process of nature, janma-mrtyu-jara-vyadhi [Bg. 13.9], that you cannot stop. Therefore any education which does not give enlightenment on the subject matter of how to stop death, they are all foolish talking.

Srila Prabhupada; lecture, 25 Jul 1975