Marat Guelman posts a poem by his father (quick translation by MB) (maratguelman):

To their father, children should be a
disappointment
otherwise what kind of children are they, whose children are they?
A donkey's? A camel's?
A father should constantly
get into a rage
break out in a cold sweat,
he should be horrified.
Otherwise what kind of father is he, whose father is he?
A mannequin's? A doll's?
Children should be such
that their father
every evening, on going to bed,
prays to High Heaven
not to wake up in the morning.
Then they are children, and he is a father,
then it becomes clear why
we call God the Father.