Signs is one of Shyamalan’s clearest films about grief turned into spiritual paralysis. Graham Hess does not lose his faith in an abstract way. He loses it through shock, anger, and the unbearable feeling that the universe has become random and cruel.
The movie’s alien-invasion surface matters so much because The invasion is terrifying, but it is also the stage on which Graham’s faith crisis plays out. Every strange detail, every apparent coincidence, and every small family habit starts pressing against the question he has been refusing to ask: is there still meaning here, or not?
By the end, the film does not erase grief. It gives grief a new frame. Graham’s wife’s last words, Merrill’s old baseball strength, Morgan’s asthma, and Bo’s water glasses do not become tidy comfort. They become a pattern he can finally bear to see.
The family dimension matters here too. The movie is about Graham’s grief, but it is never only about Graham’s grief. Merrill has to live beside it. Morgan has to live under it. Bo feels it even when she cannot articulate it. That is why the faith material lands as family drama first and theological drama second. The house is full of mourning before the aliens ever get there.