Dollars

The giving out of dollars by the Rebbe on Sundays, seemed to be another method to bring the Geula closer, through promoting the giving of charity; which, as is written in Torah, brings the Geula closer.

But in addition to giving dollars, every Sunday the Rebbe also gave advice and blessings, and miracles constantly occurred.
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In a larger context we can say, that the Rebbe was constantly bringing miracles, that are above nature, into nature. Which stretches the world and refines it.

Eventually this refines the world so that it becomes a vessel, which allows the constant miracle, of the continual revelation of Hashem into the world.

So each time that the Rebbe gave a dollar, he was pulling down another revelation of G-dliness into the world.