Is it moral for a slave to be happy in his slavery?
Is it moral for a nonslave living in the vicinity who isn't directly connected to slavery to be happy?
Is it moral to be happy in this world?

I have thought that it isn't for many years.

This morning the thought was completely foreign to me. Lately I've been feeling a fear, a stress that is really making me unhappy, to the extent that I just want it overcome so that I can be happy. The idea of the immorality of happiness was forgotten and seemed just bizarre to me.

Does one need to be unhappy in order to want to make a situation change?
Does being unhappy help make a situation change?