-Aristotle is of opinion "That the nightingales teach their young ones to sing, and spend a great deal of time and care in it;" whence it happens that those we bring up in cages, and which have not had the time to learn of their parents, want much of the grace of their singing:
Aristotelesek dio erresinulek kantatzen irakasten diela beren umeei, eta astia eta ardura darabiltza, nondik heldu baita kaiolan hazten ditugunek, beren gurasopeko eskolara joateko astirik ez baitute izan, beren soinuaren grazia asko galtzen dutela.