Envy only, forget envy, not envy immortals

The Japanese translation of the phrase 'only envy, forget envy, not envy immortals' was 'only envy, forget envy, not envy immortals.' This idiom came from a poem in Dream of the Red Chamber," Envy only mandarin ducks, not immortals." It meant that one only envied mandarin ducks, not immortals. This idiom is often used to describe people who only pursue worldly pleasures and do not care about morality and ethics or do immoral things just to satisfy their curiosity.