New York Giants wide receiver Brandon Marshall hasn’t been shy about his battles with mental illness. In fact, in recent years he has become a public voice on the struggles.

Marshall, 33, has borderline personality disorder. It created problems throughout his childhood and early in his football career. He wasn't diagnosed until 2011, and has since created Project 375 to support the cause.

With another chance to speak out about the problem, as part of the Child Mind Institute’s month-long #MyYoungerSelf social media campaign, Marshall offered this advice to his younger self: “Don’t let the diagnosis define who I am.”

Here’s the full message:

Marshall isn’t the only celebrity participating in the Mental Health Awareness Month videos. Olympic swimmer Michael Phelps, actors and actresses Emma Stone, Jesse Eisenberg and Lena Dunham and fashion designer Tommy Hilfiger also sent messages to their younger self.

Dunham's name might ring a bell. She's, um, acquaintances with Giants star wide receiver Odell Beckham Jr.