That's a terrible advice. Smart people avoid entangling their emotions into their work.

If somebody is pissed at you at work, filter information out of it, discard all emotions, from information discard all information that is not actionable for you then move on.

Don't engage into emotional layer, don't seek emotional allies. Don't expect people will behave in just and responsible manner. It should be sufficient if they are predictable. People never change, they just become more so.