Princess Diana’s legacy continues to live on through her sons, Prince William and Prince Harry. The two male royals are also instrumental in making sure the late Princess of Wales is able to secure the monarchy for a very long time.

During an interview on the podcast “Royals,” royal expert Angela Mollard praised Princess Diana for her ability to raise her two children in a positive way. According to Mollard, the Princess of Wales was able to show Prince William and Prince Harry what really matters in life.

“She was the first person that took her children to meet homeless people, to meet AIDS sufferers,” she said. “She gave them an insight into the grit of life, not just the gilded life, and I think that’s stood them terrific instead,” she added.

Mollard also quoted Kate Middleton during one of her interviews when she said that the first three years of a child’s life are the most important in terms of setting down patterns and behaviors. When Prince William and Prince Harry were still children, Princess Diana was very much involved in raising them.

“I think Diana was incredibly attentive, and she really wanted her children to have a social conscience, and they do — both of them have that. That is really the legacy. Lots have been made of the antipathy between the royal family and the Spencer family. But in lots of ways, what she has generated in her sons is going to secure the monarchy for a very long time,” she said.

Princess Diana passed away following a fatal car crash in Paris on Aug. 31, 1997. Even though Prince William and Prince Harry were just 15 and 12 years old at that time, they still have vivid memories of their late mother. During their interviews, Princess Diana’s sons, who are now parents themselves, always say that they want to make their mom proud.

Prior to her death, Princess Diana divorced Prince Charles in 1996, but the couple has been separated for four years before then. Even though they lived in separate households, Princess Diana still spent as much time with her sons as she could.

Princess Diana Picture dated 14 November 1992 of Princess Diana leaving the first anti-AIDS bookshop in Paris. Getty Images/Vincent Amalvy/AFP