Knowledge
Wood → sour → anger
Fire → bitter → joy
Earth → sweet → worry
Metal → spicy → sadness
Water → salty → fear
Thinking
Too much salty food may hurt the kidneys and cause fear or stress.
Communication and Application
Joe likes sour food and gets angry because both are linked to the Wood element and liver.
He should:
eat less sour food
relax more
sleep well
exercise and reduce stress