Law of Vibration

The law of vibration is the idea that like vibrations are harmonious and can coexist peacefully together without any alteration in their base characteristics. Dissimilar vibrations however, will act on each other in an attempt to modify or bring about a harmonious balance between the two dissimilar vibrational frequencies.

The Pocket Guide To The Law Of Attraction: Blain Tomlinson
Book:
http://www.smashwords.com/books/view/166443 

https://itunes.apple.com/us/book/pocket-guide-to-law-attraction/id567956080?mt=11