A lamp can be considered as useless by the society but it can be, still, a source of light. So when you see a lamp, imagine all the prayers it will be able to create. Don’t watch only the object. See also its impact on the subjects. Now you can imagine the same with the oil. Don’t watch only the product but see its impact on the body. And remember the sacred part of the oil. Then you will be closer to the notion of essence. Because it is also essence. Then the body which is oiled and imagine how the oil will produce the sacred essence of the faith.