Serena Williams logged on to Reddit to pen a letter of thanks and reflection to her mother. In a post entitled “Letter To My Mom,” Serena speaks on the birth of her daughter Alexis Olympia, who shares the ”exact same strong, muscular, powerful, sensational arms and body” she has. The note highlights the discrimination she has, and still endures, as a woman who does not apologize for her strength. Serena then credits her mother’s intelligence and fortitude for helping her cope through the years of unfair criticism.

Head to Reddit to read the heartwarming note.

Dear Mom, You are one of the strongest women I know. I was looking at my daughter (OMG, yes, I have a daughter ?) and she has my arms and legs! My exact same strong, muscular, powerful, sensational arms and body. I don’t know how I would react if she has to go through what I’ve gone through since I was a 15 year old and even to this day…. Read the rest on my @Reddit profile. Link in bio.

A post shared by Serena Williams (@serenawilliams) on Sep 19, 2017 at 11:20am PDT