Aspen is indicated for people who are seized by sudden fears or worries for no specific reason, and who may therefore be generally nervy and anxious. A typical need for Aspen is for waking in fear from a bad dream, even if the dream itself is forgotten. Aspen is helpful for young children experiencing nightmares and night terrors (see also Rock Rose).

Aspen fears can occur during day or night; an inexplicable anxiety or sense of foreboding may strike when alone, or suddenly in the company of friends, and may be accompanied by trembling.

The positive potential of Aspen is a state of inner peace, security and fearlessness. Apprenhension is replaced by a desire for adventure and new experiences, disregarding difficulties and dangers.

As Dr Back wrote: 'Once we come to that realisation, we are beyond pain and suffering, beyond care or worry or fear, beyond everything except the joy of life, the joy of death, and the joy of our immortality ... we can walk that path through any danger, through any difficulty, unafraid'.