It is narrated in Bihar al-Anwar that the
scholar Al-Sadiq (AS) was once asked about why a man may wake up in the morning feeling sad without knowing the reason for his sorrow. He said, ‘If that happens to him then he should know that his brother is in sorrow, and similarly if he wakes up happy without a specific reason for that joy. And Allahs help do we seek with regard to the rights of the brothers.