If I've seen it, it's been so rarely that I can't remember when and where I heard or read it in something produced by a Neopagan. It strikes me as more of a New Age-y saying, since they focus a lot on celestial-based things like ascension and lightworking and all that fluffy stuff. Though I suppose anyone who is really into astrology (who also tend to be New Agers more than Neopagans) might use the saying also.