Use an idiom to describe that moment.

Idioms that describe the right thing are:

1, just right: it means to speak and do things just right.

2, just in time: metaphor time is just right.

3. Once-in-a-thousand-year: It means that such an opportunity comes once in a thousand years, so as to describe the opportunity as extremely rare.

4. Just in time: it means just meeting that opportunity or opportunity.

5, auspicious day: generally refers to a good day for doing things.

6. Appropriateness: refers to doing or speaking very appropriately.

7. Enough is enough: it is a metaphor for doing things just right, or advising others not to go too far and be too aggressive.