In Surah Yasin, the second ayat is an oath. Allah Subhanahu Wa Ta’ala mentions how the Quran is rich in wisdom. It guides and judges by its decisive nature. Meaning, just as it takes wisdom to determine the correct and precise ruling or judgment upon a case or an individual, without wisdom, there will be flawed decisions, incorrect aspects, and injustice being done.
The Quran is evidence that humanity requires guidance, and history reflects how humanity has been in loss. The Quran is sufficient evidence and guidance, rich in wisdom and perfect in attributes of linguistic genius and knowledge that is profound and beneficial. When applied, recited, learned, and taught, it guides humanity towards gain and benefit, with salvation within the guidance, within the gardens of Jannah. The majority of humanity is, from history, in loss, except for the ones who resort to truthfulness, patience, and enjoining good and forbidding evil.
All of this relies on firm faith and certainty of belief in the oneness of Allah Subhanahu Wa Ta’ala.