The meaning behind the sticker:

What God-the Maker, says about me is so much greater > than what the mirror has to say about me/what I feel when I look in the mirror...good or bad!! My value, worth, & identity come from my Creator God alone! Trying to find them in literally anything else will always leave you feeling empty. The temporary things/people of this world will never satisfy.
They are special stickers, meaning they are backwards unless you view them in a mirror. So every time you go to take that mirror selfie, it's a reminder!