How does God know what all humans do, and hear their conversations, and know what is in their hearts, and what they think moment by moment, and at the same time, despite their large numbers?

Allah is the All-Hearing, the All-Knowing, from whom nothing is hidden. He is the Creator of His servants and their deeds, and He encompasses with His knowledge what is in their souls, as He Almighty said: "And Allah created you and what you do." His knowledge encompasses the minutiae of the universe's events and its governance, and He answers the supplication of those who supplicate, no matter how numerous they are, as Allah Almighty said through Jesus: "You know what is in my soul, and I do not know what is in Your soul." Among the proofs of the vastness of His hearing is the story of the woman who disputed, whose entire argument Allah heard, while some of it was hidden from Aisha. The texts and hadiths have confirmed that Allah is All-Hearing, Close, and answers the prayers of His servants.