How do you interpret aschers last sentence On Compassion by Barbara Lazear Ascher?

Barbara Lazear Ascher's last sentence in "On Compassion" reflects the idea that despite our ability to empathize with others and feel compassion, true altruism is difficult to achieve because of the complexities of human nature. It suggests that even when we do act compassionately, there are often underlying motives or personal benefits driving our actions.