Add to the list of infallible wisdom...

which to remember, yet ignore, and later bestow upon the grandchildren in a speech replete with finger-waggling, so that they may disregard until adulthood, then finally remember, understand, and proceed to ignore it themselves.

"The desire for something, while you cannot have it, will always outweigh the appreciation of it, once attained."

In other words...

it gets inside you.

"Have you ever been in love? Horrible isn't it? It makes you so vulnerable. It opens your chest and it opens up your heart and it means that someone can get inside you and mess you up. You build up all these defenses, you build up a whole suit of armor, so that nothing can hurt you, then one stupid person, no different from any other stupid person, wanders into your stupid life...You give them a piece of you. They didn't ask for it. They did something dumb one day, like kiss you or smile at you, and then your life isn't your own anymore. Love takes hostages. It gets inside you. It eats you out and leaves you crying in the darkness, so simple a phrase like 'maybe we should be just friends' turns into a glass splinter working its way into your heart. It hurts. Not just in the imagination. Not just in the mind. It's a soul-hurt, a real gets-inside-you-and-rips-you-apart pain. I hate love." Neil Gaiman