The very hairs of your head. — The apparent hyperbole of the figure is but the natural expression of the thought that even the incidents of life that seem most trivial are in very deed working together for good to those that love God. They are not at any moment of their lives to think that they are uncared for by their Father.
Related Commentaries of Matthew 10:30
Matthew 10:30
30 But the very hairs of your head are all numbered.