Who said "I have learned to speak with the voice of the earth."?

This quote is attributed to Swamp Thing.

I have learned to speak with the voice of the earth. - Swamp Thing

"I have learned to speak with the voice of the earth."

Swamp Thing Nature

"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."

"Nature teaches us about beauty."

"Nature teaches us patience and wisdom"

"Sometimes it snows in April."

"Every town has a soul, and Twin Peaks has a troubled one."