"The blessed John the Evangelist lived in Ephesus until extreme old age. His disciples could barely carry him to church, and he did not have the voice to speak many words. During gatherings he usually said nothing but, 'Little children, love one another.' The disciples, annoyed because they always heard the same words, said, 'Teacher, why do you always say this?' He replied with a line worthy of John: 'Because it is the Lord's commandment, and if it alone is kept, it is sufficient.'" Jerome