《黄帝内经·素问·五运行大论》
思能伤脾，怒能抑制思虑；湿能伤肌肉，风能克制湿气；甘味能伤脾，酸味能克制甘味。
思伤脾，怒胜思；湿伤肉，风胜湿；甘伤脾，酸胜甘。
Thought can injure the spleen, anger can suppress thought; dampness can injure muscles, wind can suppress dampness; sweet flavors can injure the spleen, sour flavors can suppress sweetness.