Who said "The truth of nature cannot be debated; it simply exists."?

This quote is attributed to Swamp Thing.

The truth of nature cannot be debated; it simply exists. - Swamp Thing

"The truth of nature cannot be debated; it simply exists."

Swamp Thing Truth

"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."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."