“We say in Shir Ha-ma’alot (psalms 126) [before bentching on Shabbos], ‘When God returned the captivity of Zion we were as dreamers.’  The evil we experienced in the long night of galut, and which we thought at the time so real and so fearsome, will turn out to have been nothing but a bad dream.  The reality, as we shall then see, is and always was nothing but goodness and love.  ~ R’ Eliayahu Dessler