During the last month of Imam's life, he was ill and in need of increased supervision. During the nights, a soldier would sleep just outside the door to Imam's room. Once I asked that soldier whether he had any recollections of Imam from the period when he used to watch over him.
The soldier narrates: Imam would normally wake up 2 hours before the time of the Fajr prayer. One night I heard Imam crying loudly. I also started crying. When Imam came out of his room in order to refresh his wudhu, he noticed me and said, "Oh soldier. Value your youth and worship God. The pleasure of worship is in youth. When you get old, your heart will want to worship, but you will not have the health and strength to do so."
(A memoirs by Ayatollah Tawasulli)