The Aeon (or Judgement, Last Judgement, Atonement, Resurrection) is numbered twenty and often shows figures arising from graves in answer to the clarion call of an angel. The Thoth deck veers away from the Christian overtones and instead we see the goddess Nuit, a primal sky goddess from the beginning of creation. Her body is arched above our heads and curves to imply the ankh cross, a symbol of immortality and life. A child-like male figure stands within the ankh's loop with his finger to his lips in the traditional mystical gesture of silence. A seated regal figure is behind him. Both figures are said to represent Horus, first as child and then as ruler.
Horus was the son of Osiris and Isis. When his father was murdered by his brother Set, Horus was protected and raised by Isis. Horus' ascension to manhood triggered a series of battles with Set, culminating in his assumption to the throne of Egypt. Set was sent away defeated and thus Horus is seen as a god of redemption.
The Aeon forces us to acknowledge that our actions set up a chain of cause-and-effect for which we are solely responsible. Here we pass through the fire of purification, shedding dead and dying wood as we go. We judge ourselves frankly, forgive, and leave the past behind. And then we are free to step into the light.
This is a card of healing, especially on an emotional level. It promises hope and happiness, along with a new sense of safeness, protection and recovery. We are at the place where miracles happen.