Which line from A Vindication of the Rights of Woman conveys the essay's main theme?

I believe that the line which could be considered as main theme is: "They ought to cherish a nobler ambition and by their abilities and virtues exact respect".

Wollstonecraft's purpose for writing the essay "A Vindication of the Rights of Women" was to criticize the society’s view of women. She considered the flaws they saw in women as artificial and pleaded for a better education of women. Wollstonecraft’s main statement is that women should be respected, not only admired for their beauty, which is shown in sentence: "They ought to cherish a nobler ambition and by their abilities and virtues exact respect".