"Attraction is the mutual approach of aggregates caused by concentrated waves of harmonic energy, tending to move in line of least resistance, by becoming the center of one series of concentric waves instead of two or more series." [Keely] See two controlling points of stillness, Bjerknes Effect
See Bjerknes Effect. Concordant vibrations are attractive - like number attracts like number. Because a wave train or periodic series of sound vibrations and oscillations is alternately attractive and repulsive the objects are alternately attracted and repulsed. The repulsive phase is governed by the Law of Repulsion.