The most important ingredient in everything you create is your intention. Your herbs, oils, and other magickal ingredients are all tools and definitely contain energy and spirit vibration that do the work, but they must be focused with your intention in the specific direction toward which you are working. A car may sit in the driveway, full of gas, but until you get in and turn the key with your destination in mind, it will not go anywhere. Your magickal tools of alchemical creation work the same way. You are the main ingredient that causes them to work.