The most important thing in life is not simply to capitalize on your gains. Any fool can do that. The important thing is to profit from your loses. That requires intelligence, and makes the difference between a man of sense and a fool.
Many people think that if they were only in some other place, or had some other job, they would be happy. Well, that is doubtful. So get as much happiness out of what you are doing as you can and don't put off being happy until some future date.
The ideas I stand for are not mine. I borrowed them from Socrates. I swiped them from Chesterfield. I stole them from Jesus. And I put them in a book. If you don't like their rules, whose would you use?