Traducianism contradicts the concept of the indivisibility of the soul. If the souls are incapable of division, then it is impossible for the soul of the child to be derived from the souls of the parents. But this is a merging and creation by two souls, and God would also have to divide himself in order to create a new one through his own substance. Also, in the Nicene Creed, the Son was generated, not created, and the Holy Ghost proceeds from both the Father and the Son.