New SOULMATE Principle is actually an ancient theory commonly used for the majority out-of L.J. Smith’s trilogies and you will book series, such as the Evening Community book series, The key Community publication series as well as the Vampire Diaries publication collection. It will be the theory you to two different people who’re true doomed soulmates try linked of the a beneficial ‘silver cord’, just visible to this new condemned soulmates by themselves.