Regret of neglected ...

Regret of neglected opportunity is the worst hell that a living soul can inhabit.
Regret of neglected opportunity is the worst hell that a living soul can inhabit.
 Rafael Sabatini

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 is only one boss. The customer. And he can fire everybody in the company from the chairman on down, simply by spending his money somewhere else.
 Sam Walton
Whenever you find yourself on the side of the majority, it is time to pause and reflect.
The gambling known as business looks with austere disfavor upon the business known as gambling.

Quotes from the same author

In endeavor itself there is a certain dynamic entertainment, affording an illusion of useful purpose. With achievement the illusion is dispelled. Man's greatest accomplishment is to produce change. The only good in life is study, because study is an endeavor that never reaches fulfillment. It busies a man to the end of his days, and it aims at the only true reality in all this world of shams and deceits.
 Rafael Sabatini
But I like my madness. There is a thrill in it unknown to such sanity as yours. ~ Book 1, Chapter 9.
 Rafael Sabatini