Csikszentmihalyi on drugs and their effect This is an excerpt from pp. 169-170 of a book named Flow: the psychology of optimal experience, written by Mihaly Csikszentmihalyi . It has become very difficult to understand the meaning of this
* Un­less con­sumed in highly skilled rit­ual con­texts, as is prac­ticed in many tra­di­tional so­ci­eties, what drugs in fact do is re­duce our per­cep­tion of both what can be ac­com­plished and what we as in­di­vid­u­als are able to ac­com­plish, un­til the two are in bal­ance. This is a pleas­ant state of af­fairs, but it is only a mis­lead­ing sim­u­la­tion of that en­joy­ment that comes from in­creas­ing op­por­tu­ni­ties for ac­tions and the abil­i­ties to act.*                                                        Please help me to understand the meaning of this paragraph. I asked the question on english language forums to understand its meaning but it does not seem to work as it is more of a psychology related question.
Freely translated, the author says that...

"Doing drugs is fine when performed under the guidance of experts in traditional, ritual contexts. Drugs reduce our perception of what is possible, and they reduce the perception of what we ourselves can achieve. Drugs do this until the two are in balance. This is pleasant. But, it is misleading and far greater joy can be achieved when one would stimulate the chances to achieve goals, and to enhance our possibilities to do great stuff." 

Honestly, I think this is a big mouthful of gibberish. But there you go.