Who said "You must believe in yourself first."?

This quote is attributed to Mantis.

You must believe in yourself first. - Mantis

"You must believe in yourself first."

Mantis

"I am Mantis. I like to laugh and enjoy life."

"Your emotions are like a flower - they need care to bloom."

"I find joy in the simplest moments with friends."

"Change is not scary; it is how we grow."