As the anniversary of Princess Diana's tragic death approaches, her sons, William and Harry have been revealing hidden details about her life.

For years, her sons were very private about how the loss of their mother profoundly impacted them. Within the last year, they've opened up more about mental health issues, regret and how her loss shaped their lives.

During her short time on earth, Diana captured the hearts and minds of millions with her style, her charity work and her devotion to her sons.

Say what you will about her personal life, Diana was a loyal and devoted mother to her sons and when she spoke about them, every mother could relate.

Here are 13 things she said about love and family that still speak to every mother's heart:

"Everyone needs to be valued. Everyone has the potential to give something back."

"I want my boys to have an understanding of people's emotions, their insecurities, people's distress and their hopes and dreams."

"Hugs can do great amounts of good, especially for children."

"I live for my sons. I would be lost without them."

"Family is the most important thing in the world."

"A mother's arms are more comforting than anyone else's."

"I will fight for my children on any level so they can reach their potential as human beings, and in their public duties."

No matter what was going on in her life, Diana was always there for her boys, read some more inspiring quotes on the next page...

We called her the people's princess, but to her sons, she was Mom. Princess Diana inspired us all with her style, her character and devotion to her sons.

While millions mourned her loss, it was felt no more deeply than by her two sons, princes William and Harry. It's certain that these men, who grew up in the public eye, remember a very different Diana - one who loved and protected them more than anyone else could ever know.

No matter who you are - a princess or a pauper - there is one thing that binds mothers together: the unconditional love they have for their children.

Here are a few more things Diana said about her family that are still true for many of us today:

"I don't go by the rule book. I lead from the heart, not the head."

"I don't want expensive gifts; I don't want to be bought. I have everything I want. I just want someone to be there for me, to make me feel safe and secure."

"I wish all the mothers, fathers and children out there realize how much I need them and how much I value their support."

"If you find someone you love in life, you must hang onto it, and look after it, and if you were lucky enough to find someone who loved you, then you must protect it."

"Everyone of us needs to show how much we care for each other and, in the process, care for ourselves."

"Don't call me an icon. I'm just a mother trying to help."

Do you agree with her? What are your most important 'Mom Mantras?' Let us know in the comments below!

[h/t People]