I heard from the Late Hajj Shaykh Murtaza Taliqani in Madrassa Sayyid, Najaf al-Ashraf that he witnessed two strange and opposite incidents during the time of Late Aga Sayyid Muhammad Kazim Yazdi:

One is that during summer, some students used to sleep in the courtyard and some on the terrace. One night I woke up due to commotion and saw students rushing to the courtyard and gathering around a boy. I asked what the matter was and was told that so and so Khorasani student (I forgot his name) was sleeping on the terrace; he turned sides in his sleep and fell down from the terrace.

When I reached him, I found that he was perfectly all right and was just waking up. I said: Don't tell him that he fell from the terrace. I took him to a room and gave him some warm water; till it was morning and we entered the class of Late Sayyid and narrated the incident. Sayyid was pleased and he suggested that a sheep should be slaughtered and its meat be distributed among the poor.

After some days that same student or someone else (this doubt is from me) was sleeping in the cellar of the building on a wooden plat form, which was not even a foot high. He turned sides, fell down and died immediately. His corpse was brought out from the cellar.

These two contradictory incidents and such happenings teach us that the effect of every cause depends on God, who has made the causes effective, because we see that under the effect of a strong cause, whose effect is definite, like falling down from terrace, in which bones should shatter and the person should die, but even its slightest effect did not appear, as the Almighty had not willed it. On the other hand, a fall from a small platform caused death, whereas no harm should have come to that person.