Taken from the actual formula in the Bible (Exodus 30:23). This blend of Myrrh, Cassia, Calamus and Cinnamon is a sacred and powerful blend. The Biblical measurements of shekels and hins were converted to modern day units and blended exactly as specified in the original King James text. Warning: As stated in the Bible this oil is only to be made by a perfumer but ironically is only for ceremonial anointing by a member of the clergy and not to be used on the body or you will have to face the wrath of God! Please read Exodus 30:32. This blend requires the use of Olive Oil so it would not be recommended for a diffuser.