Now there are, it should be known, four elements: earth which is dry and cold: water which is cold and wet: air which is wet and warm: fire which is warm and dry. In like manner there are also four humours, analogous to the four elements: black bile, which bears an analogy to earth, for it is dry and cold: phlegm, analogous to water, for it is cold and wet: blood, analogous to air Supplying the words, τῷ ὕδατι, ψυχρὸν γὰρ καὶ ὑγρόν· αἷμα, ἀναλογοῦν., for it is wet and warm: yellow bile, the analogue to fire, for it is warm and dry. Now, fruits are composed of the elements, and the humours are composed of the fruits, and the bodies of living creatures consist of the humours and dissolve back into them. For every thing that is compound dissolves back into its elements.