Why is this? It is because he recognizes that there is nothing more precious and worthwhile in life than spiritual wealth and the light of wisdom. Whoever it was that helped him to receive this light and wisdom is surely the archway to heaven, the final goal into which he desires to enter. It is to this archway that he makes his first bow. One finds this expression in Hafiz and Sa'di and in many other Sufi poets of Persia, who call their teacher Mihrab, the arch, the arch of that gate which leads to the shrine of God.