This also thou must consider, that many things there be, which oftentimes unsensibly trouble and vex thee, as not armed against them with patience, because they go not ordinarily under the name of pains, which in very deed are of the same nature as pain; as to slumber unquietly, to suffer heat, to want appetite: when therefore any of these things make thee discontented, check thyself with these words: Now hath pain given thee the foil; thy courage hath failed thee.