The person who will make the greatest contribution to a company is the mature person-and you cannot have maturity if you have no life or interest outside the job.
Peter DruckerIt takes far less energy to move from first-rate performance to excellence than it does to move from incompetence to mediocrity.
Peter DruckerUnless a decision has degenerated into work, it is not a decision; it is at best a good intention.
Peter Drucker