Hadith: Speak to the people according to their level of understanding. Do you wish that Allah and His Messenger be denied?

عن علي بن أبي طالب رضي الله عنه قال: "حدثوا الناس بما يعرفون، أتريدون أن يُكذَّب اللهُ ورسولهُ؟".
[صحيح] - [أخرجه البخاري]

‘Ali ibn Abi Tālib (may Allah be pleased with him) said: "Speak to the people according to their level of understanding. Do you wish that Allah and His Messenger be denied?"
[Authentic hadith] - [Narrated by Bukhari]

Explanation

The Commander of the Believers ‘Ali ibn Abi Tālib (may Allah be pleased with him) gives us advice, saying that one should not talk to common people except about what is well-known and benefits them regarding the fundamentals of their religion and the rulings related to it of monotheism, and clarification of the lawful and the unlawful. What is otherwise should not be spoken about with them in order not to distract them, especially things for which there is no need, or which may lead to rejecting the truth because they are confusing to them and too difficult for them to comprehend.