Karin's delusional and yet poignant views of God
The verbal ether Martin gave David on the boat :dayum:
David not knowing how to love his family until he had a failed suicide attempt
The deceased mother suffering from the same illness as Karin and David being happy she died so he could focus on his writing
David admitted that he wished Karin died as well and tried to relate that with Martin
The teasing and eventual incest with Minus :notithes:
The revelation of "God" and the breakdown at the end
(and if you ask me, she was really lashing out when she saw that chopper descend to take her to the hospital)