Obsession

I recollect when I was a teenage I was completely obseesed with learning foreign language. My friend of that time was furious and at the same time jealous because I spent all my free time learning and brushing up my knowledge instead of going to parties, driking booze and so on. Now I see if one isn't keen on any subject he won't reach the success in that area. It's important to be obsessed on what you really like.