In the time of Hazrat Mahdi (as), people's eyes will shine with joy

Al-Khani says: “I asked Al-Imam Abu Jaffar Muhammad ibn Ali al-Bakr and he said, ‘O Ummu Al-Khani! He will appear like light after a dark night. IF YOU LIVE AT THAT TIME [THE TIME OF HAZRAT MAHDI (AS)], YOUR EYES WILL SHINE WITH JOY’.” (Sheikh Muhammad ibn Ibrahim Numani, al-Ghaybah al-Numani, p. 171)

… From Ibrahim Al-Karkhi: ... Imam Jaffar Sadik told me: ... O Ibrahim! After fierce troubles and scourges and fear and famine, he will do away with the sorrow in people’s hearts. HOW FORTUNATE THOSE WHO LIVE IN HIS [(HAZRAT MAHDI (AS)] TIME WILL BE!

... Ibrahim Al-Karkhi says:I had never before heard words that brought me such joy and tears to my eyes. (Sheikh Muhammad ibn Ibrahim Numani, al-Ghaybah al-Numani, p. 95-96)