How long can a human survive just on cosmic energy without food and water?OK.... I will tell you, but you have to believe me.
Forever.. is the answer.
Food and water are essential for body to breath air. And you obviously know that we can survive up to 21 days without food but not without water.
Once you start consuming cosmic rays for your soul, you don't have anything, literally.
You don't have to breath, so food and water are out of thinking.
And the stage of Nirvana is possible.
But you will end up like this one.
Physically your body needs food and water. 21 days without water and you are pretty much dead. Cosmic rays are not a source of sustenance for humans or other animals. At that point it depends on your belief system....you start getting into metaphysical questions....what happens after you die...do you continue on as a spiritual being, do you cease to exist or are you reincarnated in a different form and do you even need a form of sustenance in that state. Truth is you won't know until you get in that state. As for now eat and drink because your body needs it to survive and remember to live life as a kind and thoughtful human being.