Who said "Never give up, even when the path is unclear."?

This quote is attributed to E.T..

Never give up, even when the path is unclear. - E.T.

"Never give up, even when the path is unclear."

E.T. Perseverance

"Phone home. Phone home."

"I came to Earth to heal, not to harm."

"Your heart is a good heart. I can feel it."

"Be good. Be kind. That is all that matters."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."