Sixty Days and Counting by Kim Stanley Robinson

Things you don't like, things you think are wrong, you can always walk away. You will be happier. Love and compassion are necessities, not luxuries. Without them humanity cannot survive. But compassion is not just a feeling. You have to act.

p. 235

Active compassion - or taking actions based on our compassion. Very hard to do.

And that is a good place to end this trilogy. They all live happily ever after and so one. It was a good read.