Well, I can think of at least 3 reasons:
1) Learning leads to progress. Everything we encounter in life could be thought of as result of someone learning something. e.g. As I sit here in front of my computer, I can see a lamp, a phone and a book. Someone learned to construct the lamp, someone learned to design the lamp, and someone learned to market the lamp so that someone else could purchase it.
2) Learning leads to empowerment. The more people learn things, the more we can better serve as checks and balances towards each other. That way, no one person, or group of people, can exert an inordinate amount of power over the others due to their monopoly over a certain amount of knowledge.
3) Learning is a joy! Personally, I derive such great joy whenever I know I’m going from being a less aware person, to a more aware person. I find that I can appreciate things, life, and myself better this way. And I know I’m not alone in this. I believe that everyone is naturally curious about at least something.
So my challenge for all of you right now is to pick up a book that’s in your vicinity that’s about something you’re not very aware of (e.g. for me, it would be a book about birds, or Feng Shui), open it to a random page. (Or, you can search for new topic online.) Read it, and enjoy the process of learning, motivated by nothing else but the love of learning!