Is Knowledge Good for its Own Sake?

I've been reflecting on this, and it doesn't appear that Knowledge is good for anything other than an instruction for the knower. Even having a knowledge of justice appears useless without, well, having a use for it (e.g. how to administer justice). I'm not well-versed in philosophical texts, so if anyone can point me in the right direction, or if you would like to share your own thoughts, that would be much appreciated. Thank you :)