Brilliant men are often ...

Brilliant men are often strikingly ineffectual. They fail to realize that the brilliant insight is not by itself achievement. They never have learned that insights become effectiveness only through hard systematic work.
Brilliant men are often strikingly ineffectual. They fail to realize that the brilliant insight is not by itself achievement. They never have learned that insights become effectiveness only through hard systematic work.

More phrases

Being self-made is a state of mind, and once you put that mentality to work, your success will come.
 Dave East
A lot of people change for good. Some people just fall off. Just trying to progress in anything, no matter what you're doing, I feel like any progression you make... some people aren't gonna be around you that were around you.
 Dave East
There are no secrets to success. It is the result of preparation, hard work, and learning from failure.
You have to have the service mentality in the sense that you subjugate your own ego, and you subjugate a large part of your own life to really helping other people, being successful on their behalf.
 Herb Kelleher
Success consists of going from failure to failure without loss of enthusiasm.

Quotes from the same author

The entrepreneur always searches for change, responds to it, and exploits it as an opportunity.
Efficiency is doing things right; effectiveness is doing the right things.
The best way to predict your future is to create it.
There is nothing so useless as doing efficiently that which should not be done at all.
Follow effective action with quiet reflection. From the quiet reflection will come even more effective action.