How intense is the folly, then, to say the least of it, of the friend, be he even a medical man, who thinks that his opinion, given after a cursory observation, will weigh with the patient, against the opinion of the medical attendant, given, perhaps, after years of observation, after using every help to diagnosis afforded by the stethoscope, the examination of pulse, tongue, &c.; and certainly after much more observation than the friend can possibly have had.