Elegance is elimination.

A woman has no need to be perfect or even beautiful to wear my dresses. The dress will do all that for her.

If only for the sake of elegance, I try to remain morally pure.

et iam nox umida caelo praecipitat suadentque cadentia sidera somnos

In character, in manner, in style, in all the things, the supreme excellence is simplicity

She was following in the tradition of the first lady displaying this kind of elegance as a statement about the power of the presidency.