It's possible this is:
* A fictional motto: Created for a story, game, or other creative work.
* A misremembered or misquoted motto: It could be a variation of a real motto, or a combination of elements from different sources.
* A personal motto: Someone might have created this motto for themselves or their group.
Without more context, it's impossible to determine the origin of this motto.
If you could provide any additional details about where you encountered it (e.g., a book, a movie, a website), it might be possible to track down its source.