The Expression Number The next Core Number in Numerology is the Expression or Destiny Number, which is calculated from the sum total of the digits in your full birth name. The Expression Number describes our character and the potential of our life — the substance of our life’s goal which is a lifelong project. The Expression Number calls us to reach as high as we can with the gifts we are given. With the idea of potential in mind, the Expression can also be seen as the Soul’s