While usually a "kindred spirit" is more of a platonic friendship where two people get along so well because they are similar and complimentary, this also describes a soulmate type connection where there is a deep yearning for emotional and physical closeness and bonding. Especially, "if you hear something and don't quite know what it is" seems to suggest that such rare, random and nearly miraculous subtle clues continually guide you to one another.
While usually a "kindred spirit" is more of a platonic friendship where two people get along so well because they are similar and complimentary, this also describes a soulmate type connection where there is a deep yearning for emotional and physical closeness and bonding. Especially, "if you hear something and don't quite know what it is" seems to suggest that such rare, random and nearly miraculous subtle clues continually guide you to one another.