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

Costs do not exist to be calculated. Costs exist to be reduced.
In a system the best way to treat a problem is seldom where the problem appears, because of the interactions of the parts.
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.