"The greatest scientific discovery of all human history" is how emeritus professor Sergio Focardi of the University of Bologna in Italy describes the eCat or Energy Catalyzer developed by Andrea Rossi and his team.
He adds that it is akin to the discovery of fire, a truly Promethian event which promises to change our world for ever.
Perhaps just in time - as the continuing nuclear catastrophe at Fukushima has given us a similar comment to Focardi's, but this time with negative connotations.
"Fukushima is the biggest industrial catastrophe in the history of mankind," Arnold Gundersen, a former nuclear industry senior vice president, told Al Jazeera.
Perhaps these two comments illustrate how nature always seeks a balance - the bright and the dark side by side.