Prophecy not only foretells the manner and object of Christ's coming, but presents tokens by which men are to know when it is near.... The revelator thus describes the first of the signs to precede the second advent: “There was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood.”
These signs were witnessed before the opening of the nineteenth century. In fulfilment of this prophecy there occurred, in the year 1755, the most terrible earthquake that has ever been recorded. Though commonly known as the earthquake of Lisbon, it extended to the greater part of Europe, Africa, and America. It was felt in Greenland, in the West Indies, in the island of Madeira, in Norway and Sweden, Great Britain and Ireland. It pervaded an extent of not less than four million square miles. In Africa the shock was almost as severe as in Europe. A great part of Algiers was destroyed; and a short distance from Morocco, a village containing eight or ten thousand inhabitants was swallowed up. A vast wave swept over the coast of Spain and Africa, engulfing cities, and causing great destruction.
It was in Spain and Portugal that the shock manifested its extreme violence. At Cadiz the inflowing wave was said to be sixty feet high. Mountains, “some of the largest in Portugal, were impetuously shaken, as it were, from their very foundations.” ...—Sir Charles Lyell, Principles of Geology, p. 495.... “The earthquake happened on a holy day, when the churches and convents were full of people, very few of whom escaped.”—Encyclopedia Americana, art. “Lisbon,” note (ed. 1831).... It has been estimated that ninety thousand persons lost their lives on that fatal day.32The Great Controversy, 304-305.
How frequently we hear of earthquakes and tornadoes, of destruction by fire and flood, with great loss of life and property! Apparently these calamities are capricious outbreaks of disorganized, unregulated forces of nature, wholly beyond the control of man; but in them all, God's purpose may be read. They are among the agencies by which He seeks to arouse men and women to a sense of their danger.33Prophets and Kings, 277. Mar 149
Many accept an intellectual religion, a form of godliness, when the heart is not cleansed. Let it be your prayer, “Create in me a clean heart, O God; and renew a right spirit within me.” Psalm 51:10. Deal truly with your own soul. Be as earnest, as persistent, as you would be if your mortal life were at stake. This is a matter to be settled between God and your own soul, settled for eternity. A supposed hope, and nothing more, will prove your ruin. SC 35
I beheld when he had opened the sixth seal, and, lo, there was a great earthquake. Revelation 6:12. KJV