"The Quran employs the term āyah (plural āyāt) to denote “signs”, “proofs”, or “evidence” of truth al-islam.org. In fact, the Quran refers to its own verses as āyāt, underscoring that every verse is itself a sign from God. There are nearly 400 instances of this word throughout the Quran, highlighting its centrality. These signs encompass both empirical phenomena in the natural world and rational arguments or lessons in scripture. The Quran incessantly invites believers to reflect upon the cosmos, life, history, and reason as proofs of Allah’s existence, unity, and wisdom. Classical Islamic commentators predominantly extracted theological and moral lessons from these āyāt, often interpreting descriptions of nature allegorically in line with the limited scientific knowledge of their times thequran.love. By contrast, contemporary scholars like Dr. Zia H. Shah have emphasized how strikingly many Quranic āyāt align with modern scientific discoveries, framing the Quran as a “book of signs” that anticipates facts unknown to 7th-century Arabia thequran.love thequran.love. In this article, we present several categories of Quranic āyāt — from cosmic and natural signs to logical proofs and historical examples — and examine them through both classical exegesis and modern insights. We also explore the Quran’s own assertion that God’s “words” and signs are essentially limitless, as illustrated by verses 18:109 and 31:27, implying that no amount of ink or human knowledge could ever exhaust the wisdom in them. In doing so, we demonstrate how the Quranic concept of āyāt bridges faith and reason, science and spirituality, inviting an ever-deepening understanding of divine truth. A thematic epilogue reflects on the enduring relevance of these signs in an age of continuous scientific advancement, affirming that the Quran’s guidance remains timeless and inexhaustible in meaning."