On Tuesday, Serena Williams took to Facebook to share her feelings about police violence against people of color in America. She opens up and writes about what it feels like to have to worry about her safety and the safety of her family in a time of peril.

“I am a total believer that not "everyone" is bad,” Williams wrote. “It is just the ones that are ignorant, afraid, uneducated, and insensitive that is affecting millions and millions of lives. Why did I have to think about this in 2016? Have we not gone through enough, opened so many doors, impacted billions of lives? But I realized we must stride on—for it's not how far we have come but how much further still we have to go.”

Williams joins a growing group of athletes who have been taking a stand against police violence against black Americans. Shootings in Tulsa on September 16th and in Charlotte on September 20th have further fueled passionate protests.

Williams concludes her post with a nod to Martin Luther King Jr. “As Dr. Martin Luther King said “There comes a time when silence is betrayal,” she writes. “I won’t be silent.”

See the complete post below: