The Bible is full of the references to the second coming of the Saviour and the events of the great day of God. The language of the inspired writers expresses in the most vivid manner the awful and terrific scenes of that day in which God arises from His place to punish the inhabitants of the earth.
God always warns before He sends His judgments. As He warned Sodom and Gomorrah before sending fire and brimstone and the antediluvian world through Noah before the flood, even so today He is sending a message of warning. In Revelation, Chapter 14, we find the three angels' message which is being heralded around the world.