把里面的金玉做出来
Cutting out what was already there
追琢其章，金玉其相。
Cut and carved into pattern; its substance is gold and jade.
诗经 · 棫朴
· our translation
The 琢 here is carving: the pattern is cut on the outside, but the material inside was always gold and jade. A name takes that making.
「琢」在这里是雕——外面做出纹样，里面本来就是金玉。名字用「琢」，取的是「把自己做出来」。
如琢如磨
Cut, then polished
如切如磋，如琢如磨
As if cut, as if filed; as if carved, as if polished.
论语 · 学而篇
· our translation
Zi Gong quoted the line to ask about self-cultivation: 琢 is the carving, 磨 the final polish. Together they mean the work is carried all the way through.
《诗经》原句被子贡引来问修身——「琢」是骨角玉石的加工，「磨」才是最后那道亮。两个字连用，是把功夫做到底。
琢磨雕琢切磋琢磨琢之琢玉子琢琢然
In a name
琢 is work: not what you were born as, but whether you are willing to cut.
「琢」是功夫：不是天生怎样，是肯不肯下刀。