…is used against feelings of exhaustion and tiredness that come before an effort has been made.
For those who feel that they have not sufficient strength, mentally or physically, to carry the burden of life placed upon them; the affairs of every day seem too much for them to accomplish, though they generally succeed in fulfilling their task. For those who believe that some part, of mind or body, needs to be strengthened before they can easily fulfil their work.
– The Twelve Healers and Other Remedies