על החוקים לפרטיהם, ספר ד י״טOn the Special Laws, Book IV 19
א׳
1[109] Therefore all creatures whose hooves are uniform or multiform are unclean, the one because they signify the idea that good and bad have one and the same nature, which is like confusing concave and convex or uphill and downhill in a road; the multiform because they set before our life many roads, which are rather no roads, to cheat us, for where there is a multitude to choose from it is not easy to find the best and most serviceable path.