What does “he turned over a new leaf” mean

This means changing your behavior in a positive way.

Explanation:

The saying " turning to a new light" means the same way.

For an example a student has not been doing so well on his school work and his grades have been slipping. At one point he finishes an assignment and notices its a lot less stress doing the work right away instead of putting it off so far you can't finish it in time. So he changed his way or "turned over a new leaf" to doing well in school.

If you have any questions feel free to ask in the comments.

It basically means changing something in your life in a positive way to make a new you. To try to be better at something or improve in themselves.

Explanation:

Hope this helps :)

since he could see color, and nobody else could, he didn't find it fair that everyone else in the utopia couldn't see color but him and the giver : d