The moment in between what you once were, and who you are now becoming, is where the dance of life really takes place.
No matter what age you are, or what your circumstances might be, you are special and you still have something unique to offer. Your life, because of who you are, has meaning.
If you aren't good at loving yourself, you will have a difficult time loving anyone, since you'll resent the time and energy you give another person that you aren't even giving to yourself.
They're basically moments in which you're in touch with the meaning of life, when your relationship to the rest of the universe makes sense.