Meet Zach. He passed away on Monday at age 19.

But not before creating an amazing legacy by impacting people with his beautiful heart and his song “Clouds,” which he wrote as a good-bye to his family.

Zach uploaded the song to YouTube in December and it went viral, landing him a recording contract with BMI. SoulPancake caught wind of Zach’s story and made a short film about his life, “My Last Days: Meet Zach Sobiech,” which you can watch by clicking the image above. I highly recommend you do.

The amazing thing is that Zach is smiling all through the video, an image of grace in the face of the one of the most difficult things anyone could experience. Listening to Zach left me feeling incredibly uplifted.

In the film, his girlfriend Amy says, ”He’s shown me it’s not all about the grades you get, or how cool you are in high school. It’s about doing what makes you happy and no matter when you’re going go to, live life to the fullest every day.”

Zach died of osteosarcoma, a rare cancer he was diagnosed with at 14. His family created the Zach Sobiech Osteosarcoma Fund to raise money for osteosarcoma research. You can donate to it here.

So, what do you think your legacy will be? Share with us in the comments.