Is it possible to not judge a book by its cover?

(12) On seeing a negro, or anyone unusual in facial appearance or conformation of his limbs, one says, "Blessed art Thou, O Lord our God, King of the Universe, Who variest the forms of creatures." On seeing a blind person, a cripple, or one afflicted with boils or tetters, etc. the blessing said is "Blessed art Thou, O Lord our God, King of the Universe, the true Judge." If the affliction is congenital, the blessing is "Who variest the forms of creatures." On seeing an elephant, an ape or an owl one says, "Blessed be He Who varieth the forms of creatures."

(30) One who has an deformity on his face or his hands, for example albinism, deformed [fingers], or paralyzed [fingers] should not perform the priestly blessing ("bohakniot" means a type of white lesion, and Rashi explains it means spotted (like lentils) in Old French; "akumot" means crooked; "akushot" means bent to the sides. The Ran defines: "akumot" means that his hand is bent backwards, and "akushot" means he is unable to separate his fingers) because the congregation will stare at him. And this is also the rule for one who has an deformity on his feet, in a place where they ascend to the platform without socks. And so it is if he has spittle drooling down his beard, or if his eyes tear up. And similarly, one who is blind in one of his eye should not perform the priestly blessing. However, if he is "broken in" in his city, meaning that they are familiar with him and everyone recognizes that he has this deformity, he may perform the blessing, even if he is blind in both eyes. Anyone who has stayed in the city thirty days is called "broken in in his city," but only in his city — whereas if he goes temporarily to a different city and stays there thirty days, no. Even if he did not come to live in the city to become one of the city residents, but rather to become a schoolteacher or scribe or attendant, for a year or half a year, this is considered "broken in in his city thirty days."

(20) Elisha ben Abuyah said: He who learns when a child, to what is he compared? To ink written upon a new writing sheet. And he who learns when an old man, to what is he compared? To ink written on a rubbed writing sheet. Rabbi Yose ben Judah a man of Kfar Ha-babli said: He who learns from the young, to what is he compared? To one who eats unripe grapes, and drinks wine from his vat; And he who learns from the old, to what is he compared? To one who eats ripe grapes, and drinks old wine. Rabbi said: don’t look at the container but at that which is in it: there is a new container full of old wine, and an old [container] in which there is not even new [wine].