All those people who want to know how to play blackjack must understand that the most important thing about this game is the concentration. That is, if someone takes some strategy or technique he should not abandon it, and besides, it should be borne in mind that the losses are the result of psychological errors leading to abandon a method, or simply make crazy bets that have no meaning.
You could say that a person knows how to play blackjack when it is able to use the counting of cards or the basic strategy, because it allows taking an advantage over the casino, and consequently getting good long-term gains. But many prefer quick profits and there is where you leave the system that enables them to a secure gain. That is something irrational, because anxiety has triumphed in their minds.
This is because of human nature that processes that there are important things at stake, as is the money that is bet on a game of blackjack. This acts as an element of tension, which causes a player to start to make elementary mistakes for those who understand how to play blackjack.
The secret is to adopt a long-term perspective, which means to act with coldness, as the advantage of the player is small and takes a certain amount of time to manifest itself.