Noun + にしてはじめて

[Only when; not until; for the first time upon]

Connection: Noun + にしてはじめて

Usage: Expresses that something becomes possible, understandable, or achievable only when a certain condition or stage is reached. Emphasizes that the condition mentioned is essential and that the result cannot occur without it. The noun often refers to a stage of life, a level of experience, or a specific situation.

Examples:

親になってにしてはじめて、親の気持ちがわかった。(Only when I became a parent did I understand my parents' feelings.)

失ってにしてはじめて、その大切さに気づく。(Only when you lose something do you realize its importance.)

大人にしてはじめて理解できることもある。(There are things that can only be understood as an adult.)