Before God destroyed Sodom and Gomorrah He removed the righteous first. Before He destroyed the first world, He preserved Noah and his family because they were righteous. Before God destroyed the city of Jericho He preserved the only woman who believed, Rahab and her family. God will not destroy the righteous with the wicked. This is why He warns His people to come out of the world, and not be a part of the corruption in the world. Though we live in the world we are not of this world. Let us live like pilgrims who have eternity in view.
