In truth, there is no need to change the world, but only to illuminate it.

For each thing is created anew at every moment only for the glory of its Maker. It is just that, in the dark, there is no way to understand the purpose of each thing and how it should be used. No way to know whether something is clean and ready for use, or soiled and must first be cleansed.

And so, that which could be cleansed and used for good is despised as hateful, and that which is wholly good is used for evil.

Torah is light and all G‑d's creatures are in need of it.

You can blunder around in the dark, carefully avoiding every pit. Groping through the murky haze for the right stuff, falling in the mud and struggling back up again.

Or you can turn on the light, the inner light buried without a doubt inside your heart. Even if it is ever so small, even a small light can push away the darkness of an enormous cavern.

A college student once asked the Lubavitcher Rebbe what is his job. The Rebbe gestured to the ceiling of his room and replied:

Do you see that light bulb? It is connected by wires to a power plant that powers the whole of Brooklyn. And that plant is connected to turbo-generators at Niagara Falls that power the whole of New York State and more.

Every one of us is a light bulb wired in to an infinitely powerful generator. But the room may still be dark, because the connection has yet to be made. The job of a rebbe is to take your hand in the dark room and help it find the switch.