Klal Yisroel was supposed to be in Mitzrayim 400 years. Due to the hardship, Hashem took them out after 210 years. They came out in nick of time, since they might have gone into the 50th level of impurity. So it comes out, that if not for the terrible hardship they would not have made it out. We too, in our current exile, have to believe that every bit of hardship Hashem is giving us, is part of the general picture to hasten the redemption. Of course, the closer we get to Hashem ourselves, the less we need hardships.