"She had loved him for such a long time, she thought. How was it that she did now know him at all?"
"Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love, the greater the jealousy - in fact, they are almost incompatible; one emotion hardly leaves room for the other."
"Welcome to the wonderful world of jealousy, he thought. For the price of admission, you get a splitting headache, a nearly irresistable urge to commit murder, and an inferiority complex. Yippee."