When an English speaker is drowning in details that make the big picture hard to see, she might complain, “I can’t see the forest for the trees.”
It’s an odd expression, partly ironic and partly humorous. When I hear it, I sometimes think of my sister, who, after moving from Indiana to Utah, complained that the mountains were getting in the way of her view. (Her tongue was firmly in her cheek… :-)
The expression also describes an important problem of software engineering–one that a lot of engineers don’t understand well enough. It’s a problem with generalization.