For eternity

I just read Kevin Kruse's 15 secrets Successful People Know about Time Management and now I am reading a book of meditations by Marcus Aurelius. Both books, one ancient (literally) and one 21st century, state that time can't be rented, bought or borrowed meaning wasted time is lost time. If this idea/concept has been around for millenniums, then why do some of my clients not get it? I know-- they want to pretend that time is an unlimited resource, when in fact it is finite. There are only 24 hours in day. On this note, I head to bed for my 8 hours sleep. This is how long it takes to recharge my "battery."