Bruce says: "Here is natural instinct and here is control. You are to combine the two in harmony, now if you have one to the extreme, you will be very unscientific. If you have another to the extreme, you will all of a sudden be a mechanical man, no longer a human being. It is a successful combination of both. Therefore, it is not naturalness or unnaturalness. The ideal is unnatural, naturalness or natural, unnaturalness."