There is no such thing as ageing or mortality to be honest. Truth is that ageing or mortality are really movement or motion and all motion or movement is the result of self not wanting to feel by itself. Without motioning oneself self would be by itself and it is not good to be by oneself. What it comes down to is very simple. The reason for life is companionship i.e. love. As such the fountain of youth. The fountain of youth is understanding who- and why we are. Who we are is one not wanting to be alone. Why we are is companionship, friendship, love.
~ Wald Wassermann, Physicist