The cost of success is the energy necessary to achieve what you want, be this mental or physical effort.
Maximizing time doesn't mean rushing around like there is no tomorrow.
Unlike a good wine knowledge or information doesn't age well, soon becoming obsolete or less valuable with the passing of time.
Time on the surface doesn't seem to cost anything, where in fact time costs a lifetime.
Over a lifetime there are vast amounts of available time that on analysis are wasted.
The major cost in life is the time wasted that can't possibly ever be replaced.