Isaiah 40:21

Have ye not known? have ye not heard? hath it not been told you from the beginning? have ye not understood from the foundations of the earth?

Isaiah 40:21 (KJV)

Context

The book of Isaiah is a prophetic book of the Old Testament written by the prophet Isaiah. It contains prophecies delivered to the people of Judah during a time of great political upheaval and spiritual decline. Isaiah 40:21 belongs to the section commonly called the “Book of Comfort” or the “Consolation of Israel,” which opens in chapter 40 and offers reassurance to a weary nation.

Meaning

In this verse the prophet poses a series of rhetorical questions—“Have ye not known? have ye not heard?”—to draw attention to the incomparable greatness, wisdom, and everlasting nature of God. The questions remind the listeners that God is the everlasting Creator of the ends of the earth, whose understanding never tires and whose knowledge has been present from the foundations of the world. The phrase “from the beginning” and “from the foundations of the earth” points to the antiquity and universal availability of this knowledge, passed down through tradition from the ancients. The rhetorical style is meant to convict and remind the people that they have no excuse for ignorance.

Biblical connections

The passage underscores that the knowledge of God has been communicated to humanity throughout history. God’s character, power, and plan have been proclaimed since creation, and the very order of the universe testifies to His authority. Thus the verse does not present new revelation but points to a truth that has been evident in creation from the beginning. The immediate context in Isaiah 40 assures exiled Israel of God’s power, sovereignty, and faithfulness, and that He is in control and will bring restoration and redemption.

Application

Despite the continual proclamation of God’s attributes, the verse challenges the people to examine whether they truly comprehend what has been disclosed. It suggests that many have heard the message yet have failed to grasp its significance or have chosen to disregard it, highlighting personal responsibility to seek deeper insight. The call of Isaiah 40:21 resonates for both the original audience and modern believers. We are reminded to pay careful attention to God’s revelation in Scripture, to study the Bible diligently, and to reflect on the truths about God’s character and purposes. By earnestly seeking understanding, we can deepen our relationship with the everlasting God and align our lives with His divine plan.