Where does the Dalai Lama say '... be a better whatever you already are'?

One of my favourite Buddhist quotes is from the 14th Dalai Lama > Don’t try to use what you learn from buddhism to be a buddhist; use it > to be a better whatever-you-already-are. Amazing. But does anyone know the wider context of this quote. When did he say it and what was the talk i.e. can someone get a fuller transcript of the teaching? Many Thanks