Faith & Justice

We've recently had two weeks of talks in church about Grace. In fact, 'Spoza gave an insightful talk on Sunday about how faith in God's Grace spurs us to action, and Lynette gave a thought-provoking talk on how the enormity of God's Grace defines our relationship with God.

So I guess that's why this picture (earlier the lead picture for msnbc.com) struck me - the idea that "Faith Demands Justice" is particularly foreign to me right now, since I've just had two weeks of eloquent reminder that my faith prominently rejects Justice, in its place offering Grace. Could anyone help me out here - what perspective could lead one to proclaim that "Faith Demands Justice"?

One possible idea - perhaps it comes from Eastern traditions. I'll have to ask my Buddhist friends whether the doctrine of Karma (& Reincarnation) leads to the idea that faith demands justice. Any other thoughts?