According to the temperament of the artist, he is either more inclined to nazul or to uruj. The temperament of the one who is inclined to nazul has the jemal temperament, and the one who is inclined to uruj has the jelal temperament. However, uruj and nazul both act and react upon each other. Without uruj, nazul is impossible; without nazul, uruj cannot be. They act and react upon each other; and so perfection lies in receiving both, at times nazul and at times uruj, as one divides the time of his life during day and night into action and repose. God bless you.