Who said "The swamp is patient. It outlasts all who would harm it."?

This quote is attributed to Swamp Thing.

The swamp is patient. It outlasts all who would harm it. - Swamp Thing

"The swamp is patient. It outlasts all who would harm it."

Swamp Thing Perseverance

"I am the swamp. The swamp is me."

"What was I? What am I now?"

"The man I was is gone. Only the swamp remains."

"They made me into this... this thing."

"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."