can't see the forest for the trees

can't see the forest for the trees

Cannot see, understand, or focus on a situation in its entirety due to being preoccupied with minor details. The way he's obsessing over one doorknob when we're renovating the entire house makes me think that he can't see the forest for the trees.
See also: forest, see, tree
Farlex Dictionary of Idioms.

can't see the forest for the trees

Also, can't see the wood for the trees. Focus only on small details and fail to understand larger plans or principles, as in Alex argues about petty cash and overlooks the budget-he can't see the forest for the trees . This expression was already a proverb in John Heywood's 1546 collection.
See also: forest, see, tree
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • cannot see the wood for the trees
  • can't see the wood for the trees
  • forest
  • not see the wood for the trees
  • not able to see the forest for the trees
  • not able to see the wood for the trees
  • slicker than snot on a doorknob
  • down to (someone or something)
  • down to somebody/something
  • until (one's) dying day
References in periodicals archive
We are getting walled in, drinking bottled water, and we can't see the forest for the trees.
Such is the case with the urban forest: Sometimes, we can't see the forest for the trees.
Sometimes just a patch will do, for in words of this stature, you often can't see the forest for the trees.