The Difference Between the Knowledge of Influence and the Knowledge of Calculation

Question:
This questioner, Abu 'Abdullah, says: I am reading, Shaykh, in the book of Tawhid by Imam Muhammad ibn 'Abd al-Wahhab (may Allah have mercy on him), and the difference between the knowledge of calculation and the knowledge of influence has become unclear to me.

Answer:
The knowledge of influence is the belief that the stars have an effect on the universe, and this is the belief of the people of the pre-Islamic age of ignorance. The stars are created and directed for a wisdom, so they are by the command of Allah (Glorified and Exalted is He), and they have no effect on the universe except by the permission of Allah (Glorified and Exalted is He). As for the knowledge of calculation, it is the science of astronomical calculation, and there is nothing wrong with it. Allah made the sun, the moon, and the stars for calculation; by them, the times of prayer are known, and the hours of the night and day are known. Yes.