Near the end of the sicha (ois 15) the Rebbe makes an astonishing statement that demands our attention. The verse in Tehillim (126b) states “then our mouths will be filled with laughter” (אז ימלא שחוק פינו), upon which the gemara (Brochos 31a) comments:
Rabbi Yoḥanan said in the name of Rabbi Shimon ben Yoḥai: One is forbidden to fill his mouth with mirth in this world, [as long as we are in exile (ge’onim)], as it is stated: “then will our mouths fill with laughter and our lips with song” (Psalms 126:2). When will that joyous era arrive? When “they will say among nations, the Lord has done great things with these” (Psalms 126:2).
The emphasis is that “then” is referring to the time of the future Geuloh (and thus it is explained throughout Torah, including Toras HaChassidus of all of the Rebbeim, including the Rebbe). The time to “fill our mouths with laughter” is at the time of the Geuloh. Now comes the amazing chiddush of the Rebbe:
“Then (in the time to come, l’asid lavo) we will fill our mouths with laughter.”, which, in our generation, the Nossi of the generation, my father-in-law the Rebbe, whose second name is Yitzchok, from the root meaning laughter and joy, and he is the 8th Nossi from the Baal Shem Tov (8 being the gematria of “then” in our posuk אז), the inyan of “we will fill our mouths with laughter” is done (not in the future tense, “then”, but rather) in the present tense.
A verse that is universally explained to be referring to the time of the Geuloh, some time in the future, is now explained by the Rebbe to be something that is occurring (or can occur) now! To understand better what this means (in addition to the clear implication that this aspect of Geuloh is no longer something reserved for the future) let us take the Rebbe’s own description of what it means to “fill our mouths with laughter”.
If we look at the maamor “Ani L’Dodi” printed as a Kuntres in Elul, 5750 (one year before our sicha), we will find that the Rebbe offers us the following definition of our posuk:
A smiling countenance [referring to the moshol of the King in the field] — this is the essential pleasure תענוג עצמי (which the Holy One, blessed be He, takes in Yidden), the inyan of the circus קניגיא [which Hashem will make in the times of Geuloh for the pleasure of the Tzaddikim] when we will see in a revealed way that all the war of good and evil (in this world) is only for laughter and pleasure, “then we will fill our mouths with laughter”.
This means that during Golus we are unable to properly realize that our struggle with evil is really a staged battle from which Hashem takes great pleasure and from which we ourselves will take great pleasure, and therefore we cannot “fill our mouths with laughter” because our battle against evil seems very real, the existence of the evil is an ever-present danger. But the time of Geuloh brings with it a new revelation: that this is all part of the Divine plan for Divine pleasure, and realizing this properly allows us to “fill our mouths with laughter” despite our struggles with the evil inclination. Evil is no longer real, but simply part of the “game” of this world (as the Rebbe explains earlier in this sicha regarding “when you go out to war ‘on’ your enemies” — higher than and above your enemies (to the point that they don’t have a real existence)). Thus, when the Rebbe says that we can already fill our mouths with laughter, it means that we are capable of properly grasping and internalizing the true nature of our struggle with our “enemies”. When one realizes this, he will not have any fear but rather renewed motivation to overcome these “enemies”, since he can fully recognize that this is all a Divinely ordained “circus” and not a real battle at all.
“Then” is “now”, and we can truly live Geuloh!