This is not vanity; it is analysis.
We'll let sagacity stand.

But we must also note what sagacity in this connection stands for.

When you see this you shall see also that there was nothing in it to alarm my modesty.

I don't think Mrs.Fyne credited me with the possession of wisdom tempered by common sense.

And had I had the wisdom of the Seven Sages of Antiquity, she would not have been moved to confidence or admiration.