Superhuman effort isn't worth ...

Superhuman effort isn\'t worth a damn unless it achieves results.
Superhuman effort isn't worth a damn unless it achieves results.
 Ernest Shackleton

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

After months of want and hunger, we suddenly found ourselves able to have meals fit for the gods, and with appetites the gods might have envied.
 Ernest Shackleton
Men Wanted for Dangerous Expedition: Low Wages for Long Hours of Arduous Labour under Brutal Conditions; Months of Continual Darkness and Extreme Cold; Great Risk to Life and Limb from Disease, Accidents and Other Hazards; Small Chance of Fame in Case of Success.
 Ernest Shackleton