Former President George W. Bush's daughters, Jenna Bush Hager and Barbara Bush, wrote a heartfelt letter to President Barack Obama's daughters, Sasha and Malia, before the Obama family officially leaves the White House.

The letter was published by Time magazine where the Bush twins, now 35, told Malia, 18, and Sasha, 15, all their best advice and wishes. In the letter, both former first daughters say that they will now assume a role that "they did not seek and does not have a manual." The Bush sisters urged the Obamas to take advantage of this experience they will never forget, and turn the many experiences they had in the White House and use them to "help guide us to make a positive change."

The best 7 Moments on the exposition were:

1- "Stay in touch" with your Secret Service detail.

2- "Enjoy college."

3- "Explore your passions. Learn who you are."

4- "Continue to surround yourself with loyal friends who know you, adore you and will fiercely protect you."

5- "Take all that you have seen, the people you have met, the lessons you have learned, and let that help guide you in making positive change."

6- "Traveling with our parents taught us more than any class could. It opened our eyes to new people as well as new cultures and ideas.

7- "We met factory workers in Michigan, teachers in California, doctors healing people on the Burmese border, kids who lined the dusty streets of Kampala to see the American President, and kids with HIV waiting to get the antiretroviral drugs that would save their lives. One tiny girl wearing her finest lavender dress looked young, which she was not. She was little because she was sick. Her mom admitted that she might not live to see these drugs work, but her brothers and sisters would. After meeting this girl, Barbara went back to school and changed her major, and her life’s path."

Read the complete letter HERE.