Management, business, leadership and investing quotes and many other famous quotes

To the man who only has a hammer, everything he encounters begins to look like a nail.
If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.
Best efforts are essential. Unfortunately, best efforts, people charging this way and that way without guidance of principles, can do a lot of damage.