If by that you mean that scientists are attempting to achieve what religions have been falsely promising, then ok, but so what? Before we had medicine, people could only pray to try to heal the sick. Then physicians actually started studying the body and figuring out how to cure disease, fortunately not abandoning the idea because religions had failed to deliver.
He literally thinks he's going to be able to live forever (and the technology to do so will be available within his own lifetime).
An ambitious and unlikely goal, but it's not prohibited by the laws of physics (ignoring the heat death of the universe for the moment). I'll take that optimism over the much more common attitude that accepts the destruction of billions of sentient beings as inevitable and often even desirable.