Having difficulty in moving about, he worked at home. with a blackboard hanging on the wall of his room, he gave lectures to upper-class students, graduate students, and young teachers; he was in charge of seminars and other academic activities.
Que tienen dificultad en moverse, trabajó en el hogar. con una pizarra colgada en la pared de su habitación, dio conferencias para estudiantes de clase alta, estudiantes graduados, y jóvenes profesores, estuvo a cargo de seminarios y otras actividades académicas.