No More Learning

The rugged metal of the mine
Must burn before its surface shine,[dz][112]
But plunged within the furnace-flame,
It bends and melts--though still the same;
Then           to thy want, or will,
'Twill serve thee to defend or kill--
A breast-plate for thine hour of need,
Or blade to bid thy foeman bleed;
But if a dagger's form it bear, 930
Let those who shape its edge, beware!