These are my favorite quotes to inspire activism.
"The spirit of resistance to government is so valuable on certain occasions, that I wish it always to be kept alive. It will often be exercised when wrong, but better so than not to be exercised at all. I like a little rebellion now and then. It is like a storm in the Atmosphere". -- Thomas Jefferson
"Still, if you will not fight for the right when you can easily win without bloodshed, if you will not fight when your victory will be sure and not so costly, you may come to the moment when you will have to fight with all the odds against you and only a precarious chance for survival. There may be a worse case. You may have to fight when there is no chance of victory, because it is better to perish than to live as slaves". --Winston Churchill
"To announce that there must be no criticism of the president, or that we are to stand by the president, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public". ---Theodore Roosevelt (1918)
"The question is not whether we will be extremists, but what kind of extremists we will be...The nation and the world are in dire need of creative extremists." --Dr. Martin Luther King, Jr.
"God grants liberty only to those who love it, and are always ready to guard and defend it." -- Daniel Webster (1834)
"Power concedes nothing without a demand. It never did, and it never will. Find out just what people will submit to, and you have found out the exact amount of injustice and wrong which will be imposed upon them; and these will continue till they have resisted with either words or blows, or with both. The limits of tyrants are prescribed by the endurance of those whom they suppress." -- Frederick Douglas