"the difference"

You have heard it before.
Termed "The Serenity Prayer," the saying goes something like "God grant me the courage to change the things that I can change, the patience to accept the things I cannot change, and the wisdom to know the difference." 

Wisdom is key. 

Yes, you need courage to tackle the tough issues especially those of injustice and inequality in a land flowing with, well, if not milk and honey, then certainly flowing with information and money.  Patience is also required.  Real change comes slowly usually with Herculian effort, especially where hearts and minds are concerned. 

Knowning the difference in what can be changed and what must be accepted, even termporarily, to bring about a since of community and peace, is real wisdom.