According to Michael Meister's introduction to The Inferno, Dante's story still has a powerful effect on its readers hundreds of years after its creation because of C- it deals with the human struggle with good and evil found within every person, which is still a struggle today. The fight against evil has been a universal theme in literature and still today it relates with every and any person whether religious or not.
Michael Meister wrote the foreword to Dante´s inferno published in 2007. Meister, who is a priest, points out that the Dante´s vision is so powerful that it affects readers even today.
It depends on how you interpret it. While reading it, I interpret it as he means to say that love is as innocent as a person can make it. When he states she walks in beauty, he is most likely referring to the idea that she is beautiful and has a innocent lifestyle. My apologies if this is not the answer you are looking for.
The correct answer is the line that says "In worldly riches is all their mind: They fear not my righteousness, the sharp rod" because "worldly riches" refers to material gain. Instead of worrying about their duties to God and what they would experience after death, they are more concerned with filling their lives with material, earthly pleasures.