Thus conscience does make cowards of us all.

Hamlet is beating himself up for not killing Claudius when he had the chance when he says this. I remember once I set up a long joke, and it was funny, but after a while I started feeling scared and guilty. Every time I would hide another object I would get a gut feeling. In many cases though, it's beneficial. Often it has saved lives, and even nations. I don't think we should ignore our consciences, they were given to us by god to be used. We shouldn't try to deny human nature.