Aspen is for the oversensitive: those who are victimised and haunted by irrational fears and apprehensions, who have a disquietude that cannot be clearly defined. These people can be tortured by forebodings and indistinct fears of occult character that verge on terror and panic, and which appear not only during the dark of night but during daylight as well. Still, those of them who manage to relieve themselves from this deathly grip are truly imperturbable and have the unshakeable confidence that everything will be all right and that actually everything IS all right.
Vague unknown fears, for which there can be given no explanation, no reason. Yet the patient may be terrified of something terrible going to happen, he knows not what. These vague unexplainable fears may haunt by night or day. Sufferers often are afraid to tell their trouble to others.
"The Twelve Healers and Other Remedies"