Time is totally perishable and cannot be stored. Yesterday's time is gone forever, and will never come back. Time is always in short supply. There is no substitute for time. Everything requires time.
Peter DruckerEverybody has accepted by now that change is unavoidable. But that still implies that change is like death and taxes - it should be postponed as long as possible and no change would be vastly preferable. But in a period of upheaval, such as the one we are living in, change is the norm.
Peter DruckerKnowledge has become the key economic resource and the dominant-and perhaps even the only-source of competitive advantage.
Peter Drucker