In Sermon (77), Imam Ali (a.s.) addresses a significant topic concerning astrology and its predictions. This sermon was delivered when he intended to set out for the battle against the Kharijites, and a man expressed concern about his success based on astrological beliefs. In response, the Imam made it clear that predicting a specific moment based on astrology is akin to being independent of Allah's assistance. This was a historical moment when the Imam highlighted the dangers of astrology in light of Islamic teachings.

The main themes of this sermon include reliance on Allah's help, the reality of astrology, and its pitfalls. The Imam stated that those who believe in astrology are rejecting the teachings of the Quran. This is a powerful message that we should base our successes and failures on Allah's support rather than the movements of stars.

The Imam advised people to avoid learning astrology, except for navigation on land and sea. This is a practical piece of advice emphasizing the importance of understanding the limits of knowledge, as delving into astrology can be dangerous. He made it clear that learning astrology leads one towards soothsaying and sorcery, which are deemed undesirable in Islam.

From this sermon, we learn that we should place our trust in Allah's help and understand the boundaries of knowledge. We must avoid turning to astrology, as it can lead us away from Allah. A practical takeaway from this sermon is that we should always proceed in the name of Allah, as He will guide us towards success.