It is willingness of people to give of themselves over and above the demands of the job that distinguishes the great from the merely adequate.
Peter DruckerIt’s up to you to carve out your place, to know when to change course, and to keep yourself engaged and productive during a work life that may span some 50 years.
Peter DruckerThe better a man is, the more mistakes he will make, for the more new things he will try. I would never promote to a top-level job a man who was not making mistakes...otherwise he is sure to be mediocre.
Peter Drucker