If the material is inspiring and motivates you, then it doesn't really matter what it is.
“Even if it was a difficult operation to copy a song, it only takes one person to do it. After that the spread of the song via the Internet or other means of propagation is only limited by the honesty of the users.”
“I started imagining this whole different world. It was a society of musicians, a family I hoped I could belong to one day.”