read in a self-help book once that we are biologically obliged to spend two days grieving over any loss, and after that period of time our grief is self-inflicted.
With all due respect, this book sounds like it is giving simple answers to complex problems. Grief is a profoundly deep and complex experience, but for anyone to advocate grieving over a death of someone very close for two days and then to tell them after that any grief you feel is your own doing, well I'm sorry but that is just a little too harsh, as well as inaccurate, for my tastes. People are more than biological automatons. We do not operate on biology or genes alone.
If you apply that same standard to Jehovah's Witnesses, again I must respectfully disagree. In my own situation, I spent several years wrestling with whether this was "the truth" or not. Then when I came to believe it was not, there was genuine grief, real anger and confusion that had to be dealt with. The same with my abusive family. I spent 6 years in therapy dealing with some heavy duty shit they dumped on me. It had to be dealt with, cleaned up and then I could move on. Biology had nothing to do with it.
Human beings are far more complex creatures than some computer that all you have to do is run an anti-virus program, let it scan for 30 minutes and then you're okay. No! That's wrong. People are not like that, and I reject any philosophy that says we can turn grief or sadness or anger on and off or we "should" feel grief for X amount of time. There is no should. Everyone is the same, but in different ways. We all will feel pain, or sadness or grief over similar experiences but how we express and process that experience is dependent on us, not biology.
Now if you want to talk about beliefs or behaviors that self-limit, I'll listen. You might have a cogent point, and one that we all could apply.