Who said "Greed is the true poison—worse than any toxin in my veins."?

This quote is attributed to Swamp Thing.

Greed is the true poison—worse than any toxin in my veins. - Swamp Thing

"Greed is the true poison—worse than any toxin in my veins."

Swamp Thing Justice

"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."

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."