判断・推量N2
〜に限る
it's best to... / nothing is better than...
Structure
V-辞書形 + に限る；N + に限る
Explanation
Indicates that the first clause is the best choice; the speaker's strong recommendation or judgment. Attached to the dictionary form of verbs or nouns.
Examples
風邪を引いたときは、ゆっくり休むに限る。
When you have a cold, the best thing is to rest well.
旅行のお土産は、その土地の食べ物に限る。
For souvenirs, nothing beats local food.
Note
Expresses the speaker's subjective view of the best option. Different from the limiting uses に限って/に限り.
Related Grammar
〜に限って、〜に限り〜のが一番いい