Mother feels coldness inside her heart for her family. She pretends to love her children and tolerates her husband. Mother, however, is sick. Her sickness is greed and consumption. She correlates material gratification with luck.
"It's (luck) what causes you to have money. If you're lucky you have money. That's why it's better to be born lucky than rich. If you're rich, you may lose your money."
Young Paul so wants his mother's love that he literally and figuratively goes looking for luck, the type of luck that leads to money and possessions. When Paul finds this "luck" he is unfortunately only feeding his mother's disease of greed