Mohandas Ghandi was the preeminet leader of the Indian independence
movement in British-ruled India. He is credited with saying:

You must be the change you wish to see in the world.

Helen Adams Keller was American author, political activist, and
lecturer. She was the first deafblind person to earn a bachelor or arts
degree. She is credited with saying.

The best and most beautiful things in the world cannot be seen or even
touched - they must be felt with the heart.

Samuel Langhorne Clemens, better known by his pen name Mark Twain, was
an American author and humorist. He wrote The Adventures of Tom Sawyer
and its sequel, Adventures of Hunkleberry Finn, the latter often
called The Great American Novel." He is credited with saying:

Kindness is the language whcih the deaf can hear and the blind can see.