The author most probably quotes directly from both the UN Charter (lines 8–11) and the proposal mentioned in lines 20...

Anita on June 16, 2018

The biggest difference between the two passages is "to encourage" versus "to take separate and direct action." This shows a strong difference in the strength of the language. We don't actually know whether the author thinks these are the most important parts of each document, just that they serve as a foil to the other's strength in language. @meisen