Here is the Star Stuff quote I was trying to find. If people has enough education, to understand mathematics, and science, then perhaps they would understand the commonality that we all share. You cannot argue that everyone around you is made of the same basic elements, and those atoms are made of the same subset of subatomic particles. Delenn convinces the caption to see peace with space. I would say the hidden suggestion is that we ought to make peace with each other as well. Really there is not much difference between us, why are their ideas so diverse? Probably because we have control over our own actions, we do not simply aggregate, average out, rather some human interactions cause greater and greater tension and energy to be released.
Delenn: Then I will tell you a great secret, Captain. Perhaps the greatest of all time. The molecules of your body are the same molecules that make up this station and the nebula outside, that burn in the stars themselves. We are star stuff! We are the universe, made manifest, trying to figure itself out. And as we have both learned, sometimes the universe requires a change of perspective.