You can't move so fast that you try to change the mores faster than people can accept it. That doesn't mean you do nothing but it means that you do the things that need to be done according to priority.
If you can change three lives in 10 three lives in a hundred that's got to be good hasn't it?
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Few will have the greatness to bend history itself but each of us can work to change a small portion of events and in the total of all those acts will be written the history of this generation.