Many herbs, roots and essential oils are adaptogens - natural balancers.
Lemon works on the nervous system, active as a sedative or tonic, as required. lavender is another adaptogen - small quantities are usually relaxing, while high concentrations can be stimulating.
With essential oils, balance is all, and when balanced, the body and mind can perform to their best.
Bear this in mind when you see a particular oil appearing on two lists of opposing conditions - the quantities of these oils can be all-important, as is the quality or nature of an individual person at any given time.
Reference: The Fragrant Mind: Valerie Ann Worwood
No right click