I fell in love with her courage, her sincerity, and her flaming self respect. And it's these things I'd believe in, even if the whole world indulged in wild suspicions that she wasn't all she should be. I love her and it is the beginning of everything.

This quote is about the speaker’s love for someone else. The speaker is in love with the other person’s courage, sincerity, and self respect – these are qualities that the speaker admires and respects. Even if other people were to doubt the other person, the speaker would still love and believe in them. This is the beginning of a romantic love between the two people that will hopefully grow stronger with time.