105. Confirmat autem hanc sententiam consideratio, quod animalia genita ex commixtione diversarum specierum non generant; sed sunt sterilia, ut patet in mulis. Gigantes autem non leguntur Gigantes generasse, sed natos a Filiis Dei, puta Incubis, et Filiabus hominum: cum enim concepti fuerint ex semine Dæmoniaco mixto cum humano, non potuerunt, tamquam mediæ speciei inter Dæmonem et hominem, generare. 105. In confirmation of the above inference, we observe that animals sprung from the mixing of different kinds do not breed, but are barren, as is seen with mules. Now we do not read of Giants having been begotten by other Giants, but of their having been born of the Sons of God, that is Incubi, and the Daughters of men: being thus begotten of the Demoniac sperm mixed with the human sperm, and being, as it were, an intermediate species between the Demon and man, they had no generative power. 106. Dicetur fortasse contra hoc, non posse, ex semine Dæmonum, quod pro sui natura opportet esse tenuissimum, fieri mixturam cum semine humano, quod crassum est; unde nec generatio sequi possit. 106. It may be objected that the sperm of Demons, which must, by nature, be most fluid, could not mix with the human sperm, which is thick, and that, consequently, no generation would ensue. 107. Respondeo quod, ut dictum fuit supra nº 32: virtus generandi consistit in spiritu, qui simul cum materia spumosa et viscida deciditur a generante; sequitur ex hoc, quod semen Dæmonis quantumvis tenuissimum, quia tamen materiale, optime potest commisceri cum spiritu materiali seminis humani, ac fieri generatio. 107. I reply that, as has been said above, N^r 32, the generative power lies in the spirit that comes from the generator at the same time as the spumy and viscous matter; it follows that, although most liquid, the sperm of the Demon, being nevertheless material, can very well mix with the material spirit of the human sperm, and bring about generation. 108. Replicabitur adhuc contra conclusionem, quod si vere fuisset Gigantum generatio ex semine Incuborum et Mulierum, nunc quoque Gigantes nascerentur: non desunt enim mulieres coeuntes cum Incubis, ut patet ex gestis SS. Bernardi et Petri de Alcantara, et aliarum historiarum, quæ passim ab auctoribus recitantur. 108. It will be retorted that, if the generation of Giants had really come from the combined sperms of Incubi and Women, Giants would still be born in our time, since there is no lack of women who have intercourse with Incubi, as is shown by the Acts of St Bernard and Peter of Alcantara, and other stories related by various authors.