The quote comes from a speech that Bobby Kennedy gave in South Africa in 1966:
"Each time a man stands up for an ideal, or acts to improve the lot of others, or strikes our against injustice, he sends forth a tiny ripple of hope, and crossing each other from a million different centers of energy and daring those ripples build a current which can sweep down the mightiestwalls of oppression and resistance."
Give a litte, get a little.
Pass it on.