“The inventor of modern management”, Peter F. Drucker radically changed the way management, leadership, and entrepreneurship were discussed. Through his work as a writer, teacher, management consultant and thinker, and business visionary, he has managed to make a tremendous impact on the business world. Here we’ve collected 30 of his greatest quotes that will inspire you to think about management, entrepreneurship and leadership from another perspective.

1. “Management is doing things right; leadership is doing the right things.”
2. “Unless commitment is made, there are only promises and hopes; but no plans.”
3. “Whenever you see a successful business, someone once made a courageous decision.”
4. “There is nothing quite so useless, as doing with great efficiency, something that should not be done at all.”
5. “Business has only two functions — marketing and innovation.”
6. “People who don’t take risks generally make about two big mistakes a year. People who do take risks generally make about two big mistakes a year.”
7. “Results are obtained by exploiting opportunities, not by solving problems.”
8. “Plans are only good intentions unless they immediately degenerate into hard work.”
9. “Innovation is the specific instrument of entrepreneurship…the act that endows resources with a new capacity to create wealth.”
10. “The most serious mistakes are not being made as a result of wrong answers. The true dangerous thing is asking the wrong question.”
11. “The best way to predict your future is to create it.”
12. “If you want something new, you have to stop doing something old.”
13. “The most important thing in communication is to hear what isn’t being said.”
14. “No one learns as much about a subject as one who is forced to teach it.”
15. “What gets measured gets improved.”
16. “Strategy is a commodity, execution is an art.”
17. “Effective leadership is not about making speeches or being liked; leadership is defined by results not attributes.”
18. “There is only one valid definition of business purpose: to create a customer.”
19. “Until we can manage time, we can manage nothing else.”
20. “Entrepreneurship is “risky” mainly because so few of the so-called entrepreneurs know what they are doing.”
21. “A person can perform only from strength. One cannot build performance on weakness, let alone on something one cannot do at all.”
22. “Effectiveness must be learned.”
23. “So much of what we call management consists of making it difficult for people to work.”
24. “Meetings are by definition a concession to a deficient organization. For one either meets or one works. One cannot do both at the same time.”
25. “Like so many brilliant people, he believes that ideas move mountains. But bulldozers move mountains; ideas show where the bulldozers should go to work.”
26. “Long-range planning does not deal with the future decisions, but with the future of present decisions.”
27. “Follow effective action with quiet reflection. From the quiet reflection will come even more effective action.”
28. “Entrepreneurship is neither a science nor an art. It is a practice.”
29. “Managers are action-focused; they are not philosophers and should not be.”
30. “This defines entrepreneur and entrepreneurship – the entrepreneur always searches for change, responds to it, and exploits it as an opportunity.”