Holy Books say that the Geulah-process of Mashiach HAS been coming already–over the last decades , centuries and even millenia. The Yerushalmi compares the coming of Mashiach to the GRADUAL increase of light in a sunrise–little by little, moment by moment. Because its so slow and gradual its hard to discern, but ‘slow and steady wins the race.’ So the question would not be ‘IS he coming tonight?’ but ‘HOW is he coming tonight? In WHAT WAY and FORM is he coming, today tonight and tomorrow?’