Soul mate

[Yggdrasil]

The best description for this is actually in a fictional book that Carla quite enjoyed called 2150 A.D. by Thea Alexander. In the book, they described everyone as being of some level of vibration. If you were to categorize these vibrations such as you would music and according to notes and harmonies you will see that then each individual has some relative 'harmony' with all others.

Those who are considered your soul mates are those who resonate closely with your own vibration, whom are harmonious with your frequency. These would be 'consonant' harmonies and closeness to your own vibration. Thus, energy is able to transfer more easily and naturally and the universe recognizes your natural compatibility due to reflecting its own harmonies.

Then there is what they call the "twin flames", and they are those other entities who reside in the exact same vibration as you. From this point of unity of vibration the universe recognizes you as one vibration, one entity. This would be like a 1:1 harmony, or a note being played with itself, full and total resonance. Our twin flames are the other versions of ourselves active around the universe. (Obviously talking from a perspective within creation since, of course, we are all One.)