Explain the new kind of revealation in retaion to the poem "The Second Coming"

 The title refers to the Second Coming of Christ, as predicted in the Book of Revelation in the New Testament of the Bible. It depicts the return of Christ to conquer Satan and the forces of evil, before presiding over a thousand-year reign of peace on Earth.

  The lyric opens with a typical Yeatsian image: a falcon flying in ever-widening circles (the pattern of a gyre), now tracing its widest circle and thus least subject to the control of the falconer, a symbol of the breakdown of society and order.   The phrase "the ceremony of innocence" appears several times in Yeats' poetry and generally refers to the rituals and symbols by which we live that give meaning and stability to our lives.

  The vision the speaker sees is an end of an era, the Christian era that culminated in a scientific rationalism.  A new era is at hand (they come, in Yeats’s view every 2000 years).  Appropriately the speaker describes the new era as the Second Coming, a term from the Book of Revelation that refers to the return of Christ after a time of great upheaval and disorder.  But this advent is not of Christ but of an anti-Christ–a Sphinx that presumably held sway during the twenty centuries before the birth of Jesus.  Christianity is finished, the poem says, and it will be replaced by some “pitiless” force that slouches toward Bethlehem to be born.

The Sphinx has been sleeping for the twenty centuries of the Christian era, the era that began with a “rocking cradle” at Bethlehem. Now that rocking cradle is the Sphinx’s and has vexed him to nightmare.  The Sphinx awakens and will replace Christ as the dominant force for the next historical period; its pitiless and blank gaze, its roughness, its slouch suggesting the quality of the next two thousand years, a  nature completely antithetical to the values we currently hold dear.

Many Yeats scholars believe that this poem is specifically about the Russian Revolution of 1917, also known as the Bolshevik Revolution, which resulted in a bloody seven-year war that paved the way for the rise of the Communist party in Russia; it also certainly has echoes of World War I, which rocked the world to its core. But perhaps Yeats could see even further. Perhaps he could somehow sense the coming of further wars and violences—World War II, the atomic bomb, technologies that would reshape the world from the ground up. He knew the world would never be the same after the 20th century, and it certainly is not.

Yeats gives a name to this whole series of events, placing them under the umbrella of a "Second Coming." But instead of a second appearance of Christ, this event will be a birth of a creature as significant as Christ, who will completely alter the state of the world just as Christ did—but who will operate in a completely different way than the world has been operating since Christ arrived and civilization began to form.

So the second coming means the second coming of Christ. The state of the world points to the possibility that some revelation, the Second Coming, a supernatural invasion, is impending. Literally speaking revelation means the truths which man knows only from God, The poet contemplates a revelation heralding the coming of an age which will reverse all the achievements of the Christian era.