You don't read Gatsby, I said, to learn whether adultery is good or bad but to learn about how complicated issues such as adultery and fidelity and marriage are. A great novel heightens your senses and sensitivity to the complexities of life and of individuals, and prevents you from the self-righteousness that sees morality in fixed formulas about good and evil.
Lost love is still love. It takes a different form, that's all. You can't see their smile or bring them food or tousle their hair or move them around a dance floor. But when those senses weaken another heightens. Memory. Memory becomes your partner. You nurture it. You hold it. You dance with it.
What is good? All that heightens the feeling of power in man, the will to power, power itself. What is bad? All that is born of weakness. What is happiness? The feeling that power is growing, that resistance is overcome.