- Kahlil Gibran, poet     

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

- Mahatma Gandhi

"Nobody need wait a single moment before starting to improve the world."

- Anne Frank

"Nothing I can do will change the structure of the universe. But maybe, by raising my voice, I can help the greatest of all causes - goodwill among men and peace on earth."

- Albert Einstein

During an anti-slavery speech, Sojourner Truth was heckled by an old man. "Woman, do you think that your talk about slavery does any good? Why, I don't care any more for your talk than I do for the bite of a flea."

"Perhaps not, but the Lord willing, I'll keep you scratching," she replied."

"It is useless to send armies against ideas."

- George Brandes

"An idea is the only level that moves the world."

- Arthur F. Corey