"the enemy of my enemy is my friend" is useful as a marker to how certain people's minds work, if only to show that often people's minds don't work that well.

"who can comprehend infinity?" is a dumb question, since the human brain invented the concept of infinity and has all sorts of names for it and does math with it. The universe itself so far as we know does not comprehend infinity because it is finite.

"We only use one quarter (or one fifth, or one x'th) of our brains" Well, ma nature is a parsimonious ol' hag according to the gospel of evolution and the brain is a pretty complex thing. Some parts of it can get whacked off and all you lose is your personality, which for many of us would be an undetectable difference, but there are some really important bits that when you lose them you go blind, or your memory for faces is permanenty deleted, etcetera. In short, the fact that you can kill off a lot of neurons with alcohol does not substantiate that you had a surplus to begin with, just that you probably didn't have enough to begin with and are going to have less'n less.

"cheap at half the price" shouldn't that be "cheap at twice the price" but somehow that doesn't sound as euphonious so we get by with the wrong part of that phrase.