The Midrash Says, by Rabbi Moshe Weissman writes regarding Parsha Chukas (Sefer Bamidbar, pages 245-247):
There are numerous examples of chukim…. Since thet contain apparently contradictory elements, they are liable to be ridiculed by a rational thinker. The Torah advises the Jew to tell himself, It’s a chok; I have no right to question it.”
Nevertheless, chukim are not “laws without reasons”; rather their logic is Divine. The greatest among our people were able to understand some of them.