What is be still my heart?

"Be Still My Heart" can refer to a few different cultural works, primarily in the realms of music and film/television. Here’s an overview of some possibilities:

1. Songs:
   • "Be Still My Heart" by The Postal Service: This is a song by the indie electronic band The Postal Service, featured on the expanded edition of their 2003 album, Give Up. It exhibits the band’s signature blend of electronic beats and introspective lyrics.
   • "Be Still My Heart" by Silje Nergaard: A song by Norwegian jazz vocalist Silje Nergaard from her 2001 album At First Light. The song is known for its smooth jazz elements and Nergaard’s soothing vocal delivery.
2. Film/Television:
   • “Be Still My Heart” (ER Episode): This is the title of an episode from the medical drama series ER which originally aired on February 10, 2000. It’s notable for featuring a dramatic storyline where one of the central doctors, Dr. Carter, is attacked by a patient.

If you have a specific context or medium in mind, feel free to provide more details!