43. Blood is a Very Special Fluid
There are entire libraries explaining Faust, and this saying has also been explained in countless ways. One of the latter is the highly curious one from Professor Minor of Vienna, which goes: Mephisto, the emissary of hell, cannot stand blood, hates it, and that is why he demands a signature in blood. There may be some erudition in the explanation, but there is no reason in it. Mephistopheles would not demand a signature in a substance he hates. On the contrary, Mephistopheles places particular value on blood. This material has already undergone a long development of legends. In the sixteenth [seventeenth] century we already find in the Pfitzer's Faustbuch that Faust signs over himself to the devil with blood, and in older versions of this legend it is described exactly how the vein on the left hand is opened, the blood runs out, coagulates and in coagulating forms the letters: “Oh man, flee!”