Native Son by Richard Wright:
Vera went behind the curtain and Bigger heard her trying to comfort his mother. He shut their voices out of his mind. He hated his family because he knew that they were suffering and that he was powerless to help them. He knew that the moment he allowed himself to feel to its fulness how they lived, the shame and misery of their lives, he would be swept out of himself with fear and despair. So he held toward them an attitude of iron reserve; he lived with them, but behind a wall, a curtain. And toward himself he was even more exacting. He knew that the moment he allowed what his life meant to enter fully into his consciousness, he would either kill himself or someone else. So he denied himself and acted tough.