MaH went through the process of joining up to Him all the levels that were being selected from BaN, out of which He produced the entire Tree of Holiness, namely Atzilut-Beriyah-Yetzirah-Asiyah. However, there remained further levels of BaN that were not attached to MaH. Accordingly the creation was not yet complete, because it contains certain deficiencies. This is steadily repaired little by little until eventually everything will be repaired and everything will be in a state of complete perfection.