Generosity is described as a praiseworthy trait loved by all, and the source cites a saying likening generosity to a tree in Paradise.
Seeing generosity therefore signifies goodness and blessing.
Seeing oneself act generously signifies a person of goodness and benevolence and may also signify a swift horse. If someone who is actually miserly sees themselves being generous, it signifies good character, guidance after misguidance, and diligence in religion.