“The work is so great that it seems no one can sustain it for very long. A finding that is remarkably consistent across disciplines is that four or five hours a day seems to be the upper limit of deliberate practice, and this is frequently accomplished in sessions lasting no more than an hour to ninety minutes.”
Geoff Colvin

The Author of this Quote

Authors

Geoff Colvin

"Rethink leadership, achievement, & human possibility."