"Caste/Cast" of a Man

I can’t use just any cauldron
To cast what I behold
The core must be made molten
As my legacy unfolds...
Adding substance to the fire
Heats my precious ore
Impurities trade flames entire
Soul until no more...
Courage added to the mixture
Hardens into gold
Add morals and a holy scripture
For the house he holds...
When he stands without the frame
I start to pour again
So he can pass more than his name
To copies after him...