TS,
This character is narrating the story. These words "I had no intention of drinking" are his own. There is no planning I get out of that statement. Moreover, he had already lost the dealership he once owned. And he is living on thin ice when it comes to his family. Yet he drank. The point the book is trying to make is, some have reached a threshold where, that they will hit this blind spot where they couldn't bring into consciousness the suffering and humiliation of even a week or month ago. They easily succumb to this desire. You have a point. We are searching for the "effect". And again the doctors opinion talks about it. Men and Women drink because of the 'effect produced by alcohol'.
The sensation is so elusive that, while they admit it is injurious, they cannot after a time differentiate the true from the false. To them, their alcoholic life seems the only normal one. They are restless, irritable and discontented, unless they can again experience the sense of ease and comfort which comes at once by taking a few drinks-drinks which they see others taking with impunity.
Thats the vicious cycle some of us get into. Thats why so many go back after a week, month or even years (like the man in 30 in the book) go back out. Because of the Effect. The consequences vaguely come into memory. But its easily set aside to experience the effect.
The other story they put the accountant. After a period of (i don't know how many days) he goes to washington. And as a great day. But suddenly get the idea he just going to have a couple. Nothing more. Did you plan on getting trashed NO. Always starts with a couple thats the twist.
Then the story goes, he goes on and on....his wife was to pick him at the hospital, instead a cabie drives him around for the week.
Again these are his words:
I now remembered what my alcoholic friends had told me, how they prophesied that if I had an alcoholic mind, the time and place would come I would drink again. They had said that though I did raise a defense, it would one day give way before some trivial reason for having a drink. Well, just that did happen and more, for what I had learned of alcoholism did not occur to me at all. I knew from that moment that I had an alcoholic mind. I saw that will power and self- knowledge would not help in those strange mental blank spots. I had never been able to understand people who said that a problem had them hopelessly defeated. I knew then. It was the crushing blow.