From the moment that the digestions are imperfectly performed, the humors assume a character of crudity, which disqualifies them for all their destinations, but which, above all, hinders nutrition, upon which depends the reparation of the vital forces. To be assured of the general influence of the stomach, there needs only to observe the state of a person under the complaint of a laborious digestion; his strength fails in a few minutes; a general uneasiness renders that weakness still harder to be indured; the organs of sensation grow obtuse; the soul itself cannot exercise its faculties but imperfectly; the memory, and especially the imagination, seem annihilated; nothing, in short, makes a man of sense so nearly resemble a fool, as a painful or defective digestion. A very curious observation, specified by M. PAYVA, a Portuguese physician, who resided in Rome, throws a great light on the prodigious weakness into which an excessive indulgence of venery will throw those who are guilty of it. “When (says he) the desires of the sensual joy are, in young people, risen to the greatest height, they feel a kind of agreeable sensation at the orifice of the stomach; but if they satisfy these desires with too great an impetuosity, and beyond their strength, they feel, in the same place, an extremely disgustful sensation, with something of a bitterness in it they cannot express; they pay dearly besides for their excesses, by the leanness and marasmus, &c. into which they fall[74].” ARETÆUS had, before him, taken notice of this truth[75], and BOERHAAVE employs the same expressions as PAYVA, with this addition, that that sense of pain goes off in proportion as they recover their strength[76]. He informs, in another place, the same thing, joining thereto a very useful practical rule, which is, that on the coming on of epileptic fits, after venereal excesses, care should be taken to strengthen the nerves of the stomach[77].