Question

Read these lines from the excerpt again: And such a luxury to him was this petting of his sorrows, that he could not bear to have any worldly cheeriness or any grating delight intrude upon it; it was too sacred for such contact; and so, presently, when his cousin Mary danced in, all alive with the joy of seeing home again after an age-long visit of one week to the country, he got up and moved in clouds and darkness out at one door as she brought song and sunshine in at the other. These lines from the excerpt explicitly or directly state that Tom

Answer 1

Has depression... (?)Tom feels like he needs to hold onto his sorrows, and that it is so sacred he has to move away when Mary comes in and breaks up his bad mood. Thats all i can explain, maybe you can find the answer. 

Answer 2

wants to continue to feel sad.

In the excerpt Tom taking advantage of his chance to pet his sorrows. He is allowing himself the chance and time to be sad and. He did not want anything or anyone to interrupt his mood. When his cousin, Mary, comes into the room, she is very cheerful and happy. He doesn't want her to ruin his sad move so he gets up and leaves so he can stay inside his "clouds and darkness."