Religious theme

Young Charley is hoping--praying-- for a miracle when we first see her.
She's an intelligent person going through a tough time, mentally. But she's sees her Uncle Charley as a Saviour. The whole scene of Young Charely engineering a meeting with her Uncle has an other-worldly feel in this middle class household--her father half-rising out of his chair in wonderment over the coincidence of Uncle Charly and Young Charly crossing messages--we next see Young Charly at the telegram office, where the sound has an echo-y feel and she speaks of 'telepathy'--but the mundane clerk doesn't get it. When Charly walks out of the office, she says in rapture, 'He heard me, He heard me.' Her prayer for a miracle has been answered.
But I think Hitch wants to tell a story of how a naive and simplistic religious look on life doesn't see life as it really is.
The most telling example of this is when Young Charly is walking back from church--and her Uncle is there--and he compares going to church to going to the movies--he wants to know if 'interest has fallen off....because the show's been going on so long..." This is the most subversive line in a movie from the 40s I ever heard.
Or from any time,really. But Hitchcock always got away with controversial lines.
One more example--right after the scene where her Uncle says he's going to stay--
Young Charly is all by herself in her knowledge--not just about Uncle Charly, but I think she's doubting her belief in God. She looks UP at at he sky, with the knowledge that there's nothing up there to help her. It devastates her. Hitch could've shot her looking downward--but It's important that she's looking up and seeing nothing.