This side from Jo:
Women, they have minds, and they have souls, as well as just hearts. And they’ve got ambition, and they’ve got talent, as well as just beauty. I’m so sick of people saying that love is just all a woman is fit for.
That’s pretty much the theme of her story. She adds to it later:
I don’t believe I will ever marry. I’m happy as I am, and love my liberty too well to be in any hurry to give it up.
I’d rather be a free spinster and paddle my own canoe.
That’s what makes her second-guessing whether she may have turned down Laurie too soon all the more interesting, a moment of weakness where she doubts her resolve to live a life according to her own principles.
In the end, she does.