...is the remedy for tiredness and exhaustion after an effort of some kind, such as hard physical or mental labour, or the long struggle against illness. It can be usefully contrasted with Hornbeam, which is the remedy for tiredness felt even before an effort has been made.
The remedy is given to restore feelings of strength and the faith needed to continue.
Those who have suffered much mentally or physically and are so exhausted and weary that they feel they have no more strength to make any effort. Daily life is hard work for them, without pleasure.