The poor must go about naked, without any clothing.
They harvest food for others while they themselves are starving.
They press out olive oil without being allowed to taste it,
and they tread in the winepress as they suffer from thirst.
The groans of the dying rise from the city,
and the wounded cry for help,
yet God ignores their moaning. Job 24:10
Are we saying, then, that God was unfair? Of course not! For God said to Moses,
“I will show mercy to anyone I choose,
and I will show compassion to anyone I choose.”
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So it is God who decides to show mercy. We can neither choose it nor work for it. Romans 9:14
I find verses like these to understand.