"Cedar tar and other tars or resins, such as eucalyptus, are the products of the psychic energy of the trees, and therefore they are extremely beneficial for strengthening, purifying, healing, etc. Knowing these qualities, everyone should try to apply them in the best possible way. The best tar is from Siberian cedars. If purified, tars or their oil may be taken internally. Dose: five drops or more. Everything is very individual. Perhaps your intuition will help you to find the successful combinations. The emanations of pine trees are, of course, irreplaceable. Pine trees, like electric machines, accumulate vital forces, a condensed supply of prana, or naturovaloris. The Druids considered a chalice of pine essence as a chalice of life. It is always beneficial to have in rooms small pine trees or to spray the pine essences. In this way, the atmosphere is purified, and the undesirable entities, which are so numerous around the human emanations, are driven away. Essence of peppermint is also very good for this purpose—either sprayed in the air or put in hot water for evaporation. A cup of such water should be placed near the bedside. In all the cases you mentioned this would be useful. (28 August 1931)"