It’s been 21 years since Princess Diana passed away, but she is still beloved by people all over the world. She has always been known as the people’s princess because of her unique ability to connect with people in a way that no royal had before.

Now, a heartfelt letter Diana wrote to a struggling fan in 1995 has been released to the public, and it shows perfectly how empathetic Diana was. The woman had written to Diana to talk about her personal battle with low self-esteem, and the royal promptly responded by writing, “I know that it takes great courage to write as you did.”

Diana wrote the letter days after the legendary interview with Martin Bashir in which she opened up about her failed marriage to Prince Charles with unprecedented honesty. The letter was written to a woman named Erika, and no other information is available about the recipient.

“Dearest Erika, I have received your letter and of course read it with concern and a wish to support you in any way I can,” Diana wrote. “There is a great deal of pain inside you, hence the block as you call it – that is a natural response for someone who has been through the traumas you’ve experienced. Reading between the lines of your letter I feel a very special lady is struggling with a low self-esteem because of all the bruises you had to deal with, mentally and physically.”

“I do know that it takes great courage to write as you did and with that honesty and clarity the light will appear in your tunnel,” the royal continued. “I am thinking of you so much, hang on in there Erika. Lots of love from Diana x.”

Erika gave the letter to a British royal collector, who is now selling it through Julien’s Auctions, and it is expected it to sell for at least $4,000.

“Our understanding is that Erika was a member of the public who was experiencing a troubled time and she wrote to Diana for advice and support as she herself had experienced a difficult time with the break up of her marriage,” said Martin Nolan, who works with Julien’s Auctions. “Diana is very gracious and compassionate, and she offers great encouragement to Erika that there will be light at the end of the tunnel.”

“It seems as if she is speaking from her own personal experience when she writes this,” Nolan continued. “Diana would write letters to troubled people and one can imagine how much it would have meant to Erika to receive such a warm response.”

There really will never be another princess quite like Princess Diana!