It is important in life to let go of your past and remember to put the glass down

Yes, exactly. It is awkwardly phrased, which is why I tried to counter-argue the same point. You have put it another way by asking, "where to put the glass?" and I would simply say, where it belongs. Maybe on the counter, maybe back in the kitchen.

But if we leave aside the literal placement of the glass and instead think of it as you suggest, where do we "put" our worries, then I agree with your answer. That does align with mine: it is not about discarding or smashing the glass, but about placing it down in a way that helps us move on without being crushed under its weight. In that sense, communication, whether with ourselves or with others, becomes exactly the place the glass can rest.