The four major human troubles are not only "life", "old", and "dead" that no one has escaped, and even "illness" cannot be eradicated. Mankind has its own invention of "medicine". "When the" medicine "is not very effective, the spirit, the guidance, and the wish (ancient psychotherapy) will regain its attractiveness (such as the internal dysfunction of the external dysfunction and the internal dysfunction of the external dysfunction. Out of desperate cancer patients), but they can't get rid of vassal status. This passage aims to emphasize:. ['Some fundamental human troubles are inevitable.', 'When "medicine" fails, humans turn to other methods.', '"Medicine" is the basic means of treating human disease.', 'The relationship between "disease" and "medicine" is both opposite and interdependent.']