The Symphony No. 4 in E minor by Johannes Brahms - Heartstrings
This was inspired by Symphony No. 4 in E minor by Johannes Brahms, the quoted line is the first few bars of the second movement.
The picture illustrates emotional development of a musical composition: starting with dark somber notes of miserable office workers going to their crammed workplaces on a dark morning, developing into repetitive routine of greed and buzzwords.... then gradually changing into light birds floating among the currents of wind.
Of course such is only one personal interpretation of the symphony written by Brahms in 1885, I love listening to this piece!