Mencius observes people carefully nurture paulownia trees yet neglect cultivating their own moral minds. He laments this absurd imbalance, blaming careless unthinking, and urges people to prioritize nourishing their inner virtuous nature over tending external plants.
Mencius states benevolence is humanity’s innate heart and righteousness our proper path. People rush to retrieve lost livestock yet ignore their lost moral mind. True learning solely aims to reclaim this strayed original heart.
Mencius uses barren Mount Niu as a metaphor: innate moral conscience is gradually worn away by daily desires and bad deeds. Morning pure inner vitality fades without constant nurture, urging people to guard their good hearts actively.
Mencius argues environment twists innate good nature, using barley and sensory analogies. Humans share universal tastes, hearing and sight; likewise all minds delight in principle and righteousness, proving sages and ordinary people share identical moral endowment.
Gaozi claims food and desire form human nature, benevolence springs from within while righteousness comes from external elders. Mencius refutes this with analogies, proving both virtues stem from inner moral hearts instead of outside stimuli.
Gaozi claims all innate instincts equal human nature. Mencius uses a white analogy to expose his flaw: if inherent traits define nature, dogs, oxen and humans would share identical essence. This refutes equating human nature with mere animal instincts and highlights humanity’s unique moral core.
Gaozi compares human nature to willow wood and morality to carved vessels, claiming benevolence and righteousness are artificial restraints. Mencius refutes this analogy, arguing morality should grow naturally from innate human goodness instead of mutilating one’s nature.
Zixia puts forward a balanced moral standard: never cross the line on core moral principles, yet allow flexibility for trivial daily etiquette. This dialectical view urges people to stick to major integrity while being lenient over minor flaws.