Have you ever considered negativity as a sin? It's not something that is talked about much, but by mercy it is. It's a biggie. I think it belongs in the same category as worry, gossip and pride. Grumbling, complaining, dwelling on it, thinking "Well if only" or any other multitude of thoughts that could come along with it: sin, sin, Sin!
Negativity strikes before you realize it and it sinks in deep, same with pride, it's very deep rooted. It settles into your soul like a filter. If you coat a situation with negativity, for instance a new pastor or a person or a general situation, every new thought about it has to be filtered through your negativity. Does that make sense?
There are stages of negativity:
1. Bummed over a situation
2. Dwelling over how much you dislike...
3. Sharing with someone how much you dislike...
4. Sharing as topic of discussion with many...