I was given the following scroll
and would like a translation before I keep it up on my wall. I believe it says “䤛膳琴心” but I’m not sure. Moreover, I’m not familiar with this idiom and don’t know what it means (assuming those are the characters).
剑膽琴心（膽:Traditional Chinese,=胆） 德峰书
剑胆琴心/劍膽琴心：courage of a warrior and the soul of a musician; the gall-bladder of a sword and the heart of a lute.
This kind of work is used to describe and praise the people (especially the original owner or the author himself) who has both brave and lofty temperament/taste. It's something like 文武双全/文武雙全.