What are we if not defined by what we do? We can have thousands of incredibly lucid and moving thoughts, and it means absolutely nothing without action. The concept of knowledge without communication applies. In the context of bettering the state of mankind, knowledge without media to be transmitted across is useless. Knowledge (lucid thoughts) can be useful for personal exploration, but sharing (communication) is where you can define who you are.
Don't think. Thinking is the enemy of creativity. It's self-conscious, and anything self-conscious is lousy. You can't try to do things. You simply must do things.
-- Ray Bradbury