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Robin Williams, Zelda Williams

Gregg DeGuire/FilmMagic

More than one year after Robin Williams' untimely death, his daughter Zelda Williams is speaking out and providing hope to others grieving the loss of a loved one.

In an emotional Instagram posted Saturday afternoon, the 26-year-old shared a beautiful shot of a sunrise right on the lake.

It's the story behind the image, however, that provides much deeper meaning.

"I spent this night shivering and laughing under a clear, cold sky full of stars with people I love just to witness something beautiful," she wrote in the caption. "We mooned the moon and laughed ourselves hoarse, and I'm so incredibly grateful for every silly second."

It's innocent, summer fun that the actress learned is necessary to carry on after a tragic loss.

"I came to a realization this year that I feel compelled to share here, for whomsoever may need it: Avoiding fear, sadness, or anger is not the same thing as being happy. I live my sadness every day, but I don't resent it anymore," she explained. "Instead, I do it now so that the wonderful moments of joy I do find are not in order to forget, but to inhabit and enjoy for their own sake."

She continued, "It's not easy. In fact, I'd say it takes much more effort to consciously do than it does to just stay sad, but with my heart, I cannot tell you how worth it it is."

Zelda Williams

JB Lacroix/WireImage

Ever since their father's death, Zelda and her brothers have continued to cope with his loss in individual ways. Everyone has helped continue Robin's charity work with the Challenged Athletes Foundation and St. Jude while Zelda also got a tattoo of a hummingbird in honor of her dad.

As for the reason why she's speaking out about grieving and mental health this weekend, it appears Zelda simply wants to share her story to prove life gets better.

"For those suffering from depression, I know how dark and endless that tunnel can feel, but if happiness seems impossible to find, please hold on to the possibility of hope, faint though it may be," she wrote. "Because I promise you, there's enough nights under the same yellow moon for all of us to share, no matter how or when you find your way there."