3 Metaphors for incapacity

Incapacity of melioration is the only mortal distemper.

We admit that there is in the University of Paris a professor "agrégé à la faculté des lettres," who bears the name of Rosseeuw St. Hilaire; we admit Mr. Wilson's incapacity to decipher foreign names or words, even when they stand before him in the clearest print,an incapacity of which his book affords numerous examples,and that this incapacity, and not any mental hallucination, has been the cause of the blunder which we have corrected.

An incapacity of relying on oneself and a faith in others are precisely the conditions that compel brutes to congregate and live in herds; and, again, it is essential to their safety in a country infested by large carnivora, that they should keep closely together in herds.

3 Metaphors for  incapacity