erinpaint:

The scabbard is content to be dull when it protects the keenness of the sword.
鞘安于钝，以护剑利。  泰戈尔《飞鸟集》

《The Sheath of Sword/归剑入鞘》is one of my favorite BBC Sherlock fanfic.  Unfortunately, there should be Chinese version: only:Click here This poster is created for it.

《The Sheath of Sword/归剑入鞘》是我最喜欢的BBC Sherlock同人文之一，好像目前只有中文版。这是为它创作的封面海报