Plants and their essential oils have been used for healing since ancient times — they were the original pharmaceutical. The molecules of the oils affect the limbic system of the brain, the center of emotions, behavior, motivation, olfaction and memory.
Aromatic plants produce essential oils for two reasons: protection (from pathogens, fungus, pests and as a stress response) and attraction (to lure in pollinators). We can use them for the same purposes.
Essential oils have well-known antibacterial, antiviral, anti-infectious, antifungal and other properties. Jasmine and rose are seductive aromas that also have emotional healing and balancing effects. Conifer oils are beneficial for the lungs and sinuses. Frankincense and myrrh have been used for spiritual upliftment since biblical times, and orange is known to improve mood. Many oils can be used to enhance spirituality, prayer and inner awareness.
My major use of essential oils is through diffusion, matching the needs of my client to the properties of the oils and diffusing during the session if appropriate. I can also make up blends for specific conditions.