The diseases, mental and physical, to which mortals are subject, whether visible invisible, are described as beasts of prey by the wise.
शारीरा मानसाश्चैव मानां ये तु व्याधयः। प्रत्यक्षाश्च परोक्षाश्च ते व्यालाः कथिता बुधैः॥