I'd guess he must be relying on caffeine to a certain extent, like the cola drinks you mentioned, possibly coffee or tea as well. If he's not using ANYTHING to stay awake, I'd be very surprised.
In my view, this sounds like a misguided personal development attempt. If he was my friend, I'd suggest that he find some more productive use for all the energy he's putting into this.
__________________
A truly open mind will seriously consider all points of view, even those with which it strongly disagrees for there may be a grain of truth in even the most ridiculous of opinions. |