If you ask me what's harder, being famous or flying to space, I'd say fame is much harder.

I felt so free in space, flying around and unrestrained by any social relationships, but my life since has changed a lot. Now I am extra-careful about what I say and do because everyone recognises me.

I will do my best to support science in Korea and space programs in Korea.

There is something addictive in space that makes you want to go back - like the mountain climbers who want to go back to the Himalayas although their fingers were cut by frostbite.

I don't want to be famous for being famous.

I like being famous when it's convenient for me and completely anonymous when it's not.