I considered the way that I appreciated a song so much more when I knew the words, a person that much more when I knew their story, a city when I knew of its history.
I decided, or more came to the realization, that the more you know about something, the more appreciation you have for it.
Knowledge, in general, gives meaning to existence.
So, learn. Take the risks and responsibilities that come with it. And you'll find meaning everywhere.