What makes a scientist great is the care that he takes in telling you what is wrong with his results, so that you will not misuse them.
Learning is not compulsory; it's voluntary... But to survive, we must learn.
You do not install knowledge.
Whenever there is fear, you will get wrong figures.
No one can measure the loss of business that may arise from a defective item that goes out to a customer.
Hard work and best efforts will not by themselves dig us out of the pit.