전도서 3:4의 Musar

David goes on: "One may lie down weeping at nightfall; but in the morning there are shouts of joy." Why did David not contrast "weeping" with שחוק, "laughter?" After all Solomon in Kohelet 3,4 describes the opposite of weeping as laughter. When David mentions that by morning there will be "joy," he thereby tells us something that goes beyond the antithesis of weeping. Rabbi Moshe Alshich has explained this in his commentary on Psalms 126,2, where he says that the joy referred to at the time under discussion in that Psalm will spill over from the mouth (lips) to the tongue. It is only by a miracle that the tongue can rejoice at a time when the mouth is full of laughter. When the Gentile nations observe this, (126,3) they will comment that G–d has indeed done great things for the Jewish people. At any rate, the trials do not last longer than from evening to morning.