Must not the Lord of all do rightly? 
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A Jewish fable tells of a rabbi who went on a journey with 
the prophet Elijah. At nightfall, they came to the cottage 
of a poor man and his wife, whose only earthly treasure was 
a cow. The man and his wife welcomed the strangers, fed 
them their best food, and put them to bed in their own bed, 
while the hosts lay down before the kitchen fire. But in the 
morning the poor man's cow was dead.
 
The next evening the rabbi and Elijah came to the house of a 
wealthy merchant. He treated them coldly, fed them bread and 
water, and put them to bed in a cow shed. In the morning, 
Elijah thanked him for what he had done and sent for a 
mason to repair one of the rich man's walls, which was falling 
down, as a return for his kindness.
 
The rabbi could not keep his silence. He asked the prophet 
to explain the treatment of the two hosts. The prophet replied, 
"In regards to the poor man, it had been decreed that his wife 
would die that night, but in reward for his kindness, God 
took the cow instead of his wife. In regards to the rich miser, 
I repaired his wall because a chest of gold was concealed near 
the place, and if the miser had repaired it himself, he would 
have discovered the treasure." The moral of the tale was: Do 
not say to the Lord, "What are You doing?" But say in your heart, 
"Must not the Lord of all do rightly?" We don't always see the 
big picture as God does!

- source unknown