" The man who is too isolated grows timid, abstracted, a little odd: He stumbles along amid realities like a sailor who has just come off his ship; he has lost the sense of the human lot; he seems to look on you as if you were a "proposition" to be inserted in a syllogism, or an example to be put down in a notebook. "

― Antonin Sertillanges , The Intellectual Life: Its Spirit, Conditions, Methods