Something is wrong with the human race. We all sense it. Things aren't the way they should be. Not in the world. Not in our neighbors. Not in ourselves.
We aren't as kind, as generous, or as loving as we should be. We do things we shouldn't. We are selfish, arrogant, sometimes even cruel. We use other people for our own ends. We fall short even of our own low standards.
"The gravest obligation requires the acceptance and practice, not of the religion which one may choose, but of that which God prescribes and which is known by certain and indubitable marks to be the only true one."
~ Leo XIII in his Encyclical Immortale Dei (November 1, 1885); on our fundamenal duty; (from the article Religious Toleration)