It really isn't. Hatred and infatuation are both further away from understanding than admiration is. So, I expect, is indifference. Then there's the state of 'incomprehension'...
Apart from being technically absurd the quote also gives a message that I don't particularly like. I'll cynical it up with the best of them but I reserve the right to admire things that I understand. In fact, I've discovered that my taste in music largely consists of admiring songs that convey insight that I understand and empathise with. This holds even when confessing to liking Hillary Duff and Pink sends all the wrong signals of affiliation.
To put it In context, the quote should read: "admiration for another person is the state furthest from understanding."
A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).