Who said "The future is written in invisible ink."?

This quote is attributed to Mary Wollstonecraft Shelley.

The future is written in invisible ink. - Mary Wollstonecraft Shelley

"The future is written in invisible ink."

Mary Wollstonecraft Shelley

Novelist Poet English 1797–1851

"Nothing contributes so much to tranquilize the mind as a steady purpose."

"I am a writer, therefore I am not a respectable woman."

"The beginning is always today."

"No creature is fully employed whose passions are not engaged."