This statement is also the basis for all quotations in action or thriller films which lead to the death of the one who speaks it. More likely than not, this individual will be a scientist, more specifically a scientist involved with genetic engineering. Trust me on this one. If a scientist guy says something even close to this, he will die, usually in some creative manner. The most recent movie that I can recall that follows the "equate-humans-to-gods-and-die" concept is Deep Blue Sea. If you haven't seen the film, you will immediately know when harm will come to a certain character; it's just so obvious. As to whether or not saying something along these lines in real life will affect you, I don't know. All I know is that I don't want to piss off mother nature or God and have a group of caterpillars come to feast upon my living corpse, so I won't take the chance.