What did oppenheimer tell his brother that showed how much he loved physics?

To show how much he loved physics, Julius Robert Oppenheimer told his brother Frank in a letter:” I can't think that it would be terrible of me to say — and it is occasionally true — that I need physics more than friends”. Letters to his brother, Frank, were published n Robert Oppenheimer : Letters and Recollections (1995).

this forms a narrow, steep sided inlet (sometimes deeper than 1300 metres) connected to the sea. the terminal moraine pushed down the valley by the glacier is left underwater at the fjord’s entrance, causing the water at the neck of the fjord to be shallower than the main body of the fjord behind it.