Jonathan Edwards in his speech "Sinners in the Hands of an Angry God" preached about the future of sinners in hell. No matter how far or hidden one is, there will be judgement for each and every sinner. So, he implored for the people to repent and seek the kingdom of God while there is still time.
By preaching about the risks of being 'unsaved' at the time of 'rupture or second coming', Edwards is taking the role of a prophet. He also wanted them to fully understand the importance of seeking God first before it's too late. No one can be saved from the fury of God when he decides to pass judgement. So the only thing a man can do to save himself is to draw nearer to Him and be saved.
