1.
When we play, we must realize, before anything else, that we are out to make money.
David Sklansky
3.
Every time you play a hand differently from the way you would have played it if you could see all your opponents' cards, they gain; and every time you play your hand the same way you would have played it if you could see all their cards, they lose. Conversely, every time opponents play their hands differently from the way they would have if they could see all your cards, you gain; and every time they play their hands the same way they would have played if they could see all your cards, you lose.
David Sklansky
4.
Anytime you make a bet with the best of it, where the odds are in your favor, you have earned something on that bet, whether you actually win or lose the bet. By the same token when you make a bet with the worst of it, where the odds are not in your favor, you have lost something, whether you actually win or lose the bet.
David Sklansky
