Always in my head that 'I'll be able to drink again... someday'. Or, 'I can control it'.
I've only successfully(? I mean, I failed, so...) gotten sober once for any duration (4 months and change), and thought 'I've licked this!'.
Did fairly well... for about a month. Then, it got bad. The last 2-3 days were the worst bender I ever had.
Can't do it. Can't give in. Can't drink. Period.