The society Cassia lives in is very put together. Everyhting is plannd and thought out. You dont even have to pick who you marry! You can only read The 100 Books, only listen to the 100 Songs, poems, and stories.
Cassia's grandfather gives her a poem and she finally finds time to read it during her hike and the woods. But her "maybe" match catches her. When he tells her they go on to do many other rebellious things.
I believe this will lead to a rebellion. Cassia kept secrets from her friends and family for their protection and from her government to avoid trouble. When she comes clean and shows others what she knows they will follow her into rebellion.