Whoever knows the mystery of vibrations indeed knows all things.

Bowl of Saki, Hazrat Inayat Khan
All planes of existence consist of vibrations, from the finest to the grossest kind; the vibrations of each plane have come from a higher one, and have become grosser. Whoever knows the mystery of vibrations, he indeed knows all things. ... From the scientific standpoint, spirit and matter are quite different from each other, but according to the philosophical point of view they are one. Spirit and matter are different, just as water is different from snow; yet again they are not different, for snow is nothing other than water. When spiritual vibrations become more dense they turn into matter, and when material vibrations become finer they develop into spirit.