They are used in every major religion. Myrrh is a gum from a tree, and this is used as incense in churches. Rosewater symbolizes purity and good fortune. The subconscious needs some of these scents and smells to realize what we want to do. It cannot help us, and it might even work against us, if it does not know this.
Smells evoke mental images that affect and change our life energy fields.
Herbs and scents can be said to attract the attention of your inner self, by creating mental images in both your conscious and subconscious mind. Aromatherapy is an example of using scents to bring about beneficial changes in people. Certain herbs and teas also help with life problems. You can see the effects when you think about the perfumes and air fresheners used today. Herbs have a long list of purposes.