In his memoirs, Dick Van Dyke called his performance "one of the best and most powerful pieces of acting in my career, as well as one of the most personal." See more
[after Charlie has attended an important meeting while hung over
I'm not going to mince words, Charlie. We've known each other too long for that. You were a disgrace this morning; I can still smell the liquor on your breath. I don't know how many of those men knew you were hung over, but I certainly did.