A decent article, although it doesn't touch on why or how the reader who wrote in developed those feelings of guilt, which is the more important issue.

The article covers the cursory salient points within philosophy relating to Kant, although I would have liked it more if they had also covered the salient points of altruism which are particularly relevant.

There is an important distinction between altruism and charity and many people seem to conflate the two as interchangeable.