In spite of all that, it turns out that's got nothing to do with the meaning of the meme. I suspected all along that there was something behind it that was not being explained. So in the end I Googled it and found it was only the first sentence of a more complete quotation. It's on a poster
here, but I won't display it because it's too big and overflows the screen. It's from the journalist and author
Sophia A. Nelson (born 1967), who said this:
Be a woman other women can trust. Have the courage to tell another woman direct when she has offended, hurt or disappointed you. Successful women have a loyal tribe of loyal and honest women behind them. Not haters. Not backstabbers or women who whisper behind their back. Be a woman who lifts other women.