They feel life-supporting, vital, alive, engaged on the level of energy. Each single oil is used for many purposes. For example, peppermint oil is an anti-inflammatory used to treat rheumatism and arthritis. Peppermint is used by confectioners, and it is also an ingredient in aftershave lotions. It has been reported to cure headaches, clear an ant's nest, and deter mice from spending the winter in your roof - all quite different forms of use.
Liquid is a most effective, convenient medium.
A few drops of pure lavender oil wiped on a burn effects the most remarkable cure as the skin returns to normal within days, whereas without it there would be a blistering patch and, eventually, a scar. When you have a headache you can rub a drop on your temples for relief. Lavender is a natural deterrent of mosquitoes and moths, it can easily be dabbed on a ribbon and hung at the window, or put on a cotton ball and placed in the closet or drawer. The fact that it smells wonderful makes it delightful as well as versatile and useful. One of the must useful condensed descriptions of essential oils that I have read is Valerie Ann Worwood's introduction in her book, The Complete Book of Essential Oils and Aromatherapy .