Can We Really Tell Ourselves How We Should Feel?

I guess not.

The emotion usually comes so fast I don't really have the time to think which feeling should manifest in my heart at that very moment. And you can't tell another person, "No, you should not feel this way, it's not right." I think that's such a superficial remark.

When I was studying in Uni, the psychology of feeling is very much attached to what we think about something (cognitive). Is it a chicken 'n' egg so we'll just have to work around it.