Clement of Alexandria The Instructor Book II We must therefore abstain from these viands not for fear (because there is no power in them); but on account of our conscience, which is holy, and out of detestation of the demons to which they are dedicated, are we to loathe them; and further, on account of the instability of those who regard many things in a way that makes them prone to fall, "whose conscience, being weak, is defiled: for meat commendeth us not to God."[20] Clement of Alexandria Stromata Book II ; sins of deed, by the rapacious and carnivorous birds. The sow delights in dirt and dung; and we ought not to have "a conscience" that is "defiled."[155] Clement of Alexandria Stromata Book V "Knowledge is not in all,"[44] Tertullian On Modesty But, so sinning, by shocking the weak consciences of the brethren thoroughly, they will sin against Christ."[148]