we sat down with rick santorum, the former senator and presidential candidate.he told us one of the saddest things we have ever heard, the story of the loss of his own son. and yet somehow, probably because it is real, that tragedy became a source of joy for his family. it does not mean they are not sad about it. but it means that they are closer to god because of it. here is part of that conversation, watch. ♪ ♪ >> i see god as someone -- i have this much knowledge of what is going on in the world compared to this implement knowledge, and so my perspective from this little point of view that i have does not take in things that i have no idea what is actually going on. so i never worry about failure. because if mother teresa, one of who -- i had the honor of meeting shortly before she died, and my favorite quote of hers is god is not calling you to be successful, he calls on you to be faithful. and if you are faithful, god will work -- you may have impact on your fidelity will have impact on, you may not even see it, but it will. and luckily in my life i have ha