421. Verse 22 And Zillah also, she gave birth to Tubal-cain, teacher of every craftsman in bronze and iron. And Tubal-cain's sister was Naamah. 'Zillah', as has been stated, means the mother of the natural features of the new Church. 'Tubal-cain, a teacher of every craftsman in bronze and iron' means the doctrine of natural good and truth; 'bronze' means natural good, 'iron' natural truth. 'Tubal-cain's sister was Naamah' means another Church or doctrine of natural good and truth, which though similar was not an integral part of that Church.