《黄帝四经·十大经·观》
不婚娶交配人类便得不到繁衍，这样也就谈不上持守地道；无饮食来源人便不重养育，这样也就谈不上持守天道。
不会不继，无与守地；不食不人，无与守天。
Without marriage and copulation, humans cannot flourish, so it is not possible to uphold the Earth's way; without food sources, people will not value nurturing, so it is not possible to uphold the Heavens' way.