Belief
Kurt didn't believe in God. He just couldn't, not with the way so many people who claimed they believed in a benevolent, all-seeing, perfect deity condemned him for something over which he had no control.
Sam had never suggested that Kurt was wrong in this decision. Once or twice, Sam had commented that it sounded more like Kurt didn't believe in religion, rather than God. But for Kurt, they were not mutually exclusive. One did not exist without the other, and he would not take part.
He hadn't meant to overhear a discussion among the Glee club several months after Burt woke up from his coma, and they probably didn't mean him to, considering the subject matter. Still, he couldn't deny it had hurt to listen to Mercedes call him shallow to close his mind to faith. Rachel had piped up about the many different religions which all followed certain basic tenants, and that this must be proof of some greater force at work. Quinn also talked about how she was a better person when she trusted in her God, in her church and its teachings. Even Puck, the "bad jew" who openly admitted to only practice his faith on Jewish holidays and when his Nana dragged him to Temple, mentioned that Kurt's absolute denial of God made him uncomfortable.
Santana didn't speak. Tina was listening, but not saying anything. Artie made a single reference to the Torrah, while Sam suggested they should "judge not", which was met with a chorus of denials that they even were judging.
The surprises were Brittany and Finn.
Finn pointed out that, if any of the club had been better friends to Kurt during the Grilled Cheesus mess, they would have listened and respected the countertenor's discomfort with religion. They wouldn't have made things worse by focusing on conversion rather than comfort.
But it was Brittany who spoke up, in that guileless, absently brilliant way of hers, to say that she didn't believe in God, because she had never seen God. She believed in love, because she saw that all the time.
And Kurt had stood outside the door, barely noting the stunned silence, caught up in Brittany's assertion. Then he finally swept through the door, ignored the room at large, and walked over to ask Brittany if he could give her a hug. She'd bounced and smiled brightly, burrowed into his arms, and easily told him she loved him.
Kurt had never felt so humbled in his life.