This is the significance of the Egyptians mourning him for seventy days. The pure oil into light. This was the spiritual quest and accomplishment of Jacob's beloved son, Joseph, as well. The word for divining is nachash , the same word as the word for the serpent who seduced Adam and Eve into eating the forbidden fruit from the Tree of Knowledge, and the same numerical value as the Messiah. Joseph raised the serpent to the level of Wisdom.
Oil represents wisdom.
In doing this, may we all merit to be blessed with a year of goodness and joy, with health, children and sustenance, plus all of the spiritual blessings including the coming of the righteous Messiah.