An Introspective Question

Something I'm meditating on in my time with God lately...

How can I tell the difference between righteous indignation and self-righteous indignation?

That is, there are injustices in the world that should rightly rouse our passions. But how do we tell the difference between THAT or rancor from everyday petty annoyances, mere insults to our pride, or other issues that really center more on our own selfishness? Because I don't believe God would will for us to be angry at an opportunity to learn patience, humility, or some other virtuous trait.

I'm speaking in generalities, I know, and I'm not sure if any of that is even comprehensible. But this is what my mind has been wrestling with in the last 24 hours.