De Hidalgo later recalled Callas as "a phenomenon... She would listen to all my students, sopranos, mezzos, tenors... She could do it all." Callas herself said that she would go to "the "conservatoire" at 10 in the morning and leave with the last pupil ... devouring music" for 10 hours a day. When asked by her teacher why she did this, her answer was that even "with the least talented pupil, "he" can teach you something that you, the most talented, might not be able to do."