There are some people who try to do some good, even if the result benefits them or not, but they tend to be sad in their insides. However, other people act without thinking about the negative consequences to others, just looking for their own benefits and, for that, they leave their empathy aside.
Each one has its advantages and disadvantages: in the first one you feel OK with yourself but you are usually trampled by others. In the second one, you usually get what you propose at the expense of not being comfortable with yourself.
Reference image: @isabel_hendrix
This illustration is available on Society6: https://society6.com/scamposart/collection/good-vs-evil