Suggestion:

> Cooperation is the social manifestation of creation:  work alone, with a friend, or with a thousand, but don't let your brainchildren stay silent.  By opening them to the world, you invite 7 billion people to truly appreciate and nurture your ideas -- to stand on your shoulders and appreciate the view.

Rationale: without going too heavily into the actual phrasing I'm using here, and with the caveat that I'm not yet 100% happy with my suggestion, I want to say that this is one of my most fundamental tenets in life.  I strive to be as open as possible, with my ideas and my past and whatever, so this is really something I believe down to my core.  But I have a problem particularly with "you own your work, not your ideas":  it's too harsh.  Yes, knowledge can never be undiscovered, and it's selfish and egotistical to try to hoard every thought you've had, but this feels way too confrontational.  If we say "you don't own your ideas", we will really alienate a lot of very passionate people who just aren't quite ready to let go, before they even step foot in the door.  But if we tell them what it really means to cooperate, what it does for the world, for yourself... then we have a very real chance of convincing them.