We are all energetic beings. When we think things, feel things, visualize things, this sets our energy vibrating at a certain "wavelength" so to speak. The thing about the law of attraction is that for every vibration you have, if you keep that vibration long enough (68 seconds at least) the universe will match it with something and you will attract it back to yourself. So that angry client? If you sit and stew and worry and complain about it, you are attracting more of them back to you.
Empathy is great for certain circumstances but euthanasia is not one of them if I am the doctor delivering it. By definition empathy is sharing the feelings and emotions of another. Not only is that exhausting for me but it puts me on an emotional roller coaster all day every day. It brings me down and makes me less effective for the rest of the day. THIS is empathy fatigue and it is real.
When I began doing personal development work one of the most helpful things that I learned from Stacey Martino was "it's not about you". It's not about you is a kind of mantra that I keep close at hand at work all day, everyday so that I can rely on it when I need it. And trust me, with the work we do, we need it a lot.