Likewise, when you're in a sour mood your mind naturally gravitates towards other negative ideas. It's curious, I see when we're fairly happy we may intellectually acknowledge that, say, our guild is excessively materialistic, but it won't emotionally bother us. But as soon as we're in a crappy mood, suddenly we're grumpy about the same topic. I've found that the more you can separate out your issues and take your life to where you desire it to be, the less old injustices get to you. You may still acknowledge certain things as problems, only they don't possess the power to rankle you like they applied to.