It's Martin Luther King, Jr.

Today is inspiring in light of tomorrow.
Here is MLK, Jr.'s speech in full and
Lime posted the text.

Here is a part...

There are those who are asking the devotees of civil rights, "When will you
be satisfied?" We can never be satisfied as long as the Negro is the victim of
the unspeakable horrors of police brutality. We can never be satisfied as long
as our bodies, heavy with the fatigue of travel, cannot gain lodging in the
motels of the highways and the hotels of the cities. We cannot be satisfied as
long as the negro's basic mobility is from a smaller ghetto to a larger one. We
can never be satisfied as long as our children are stripped of their self-hood
and robbed of their dignity by signs stating: "For Whites Only." We cannot be
satisfied as long as a Negro in Mississippi cannot vote and a Negro in New York
believes he has nothing for which to vote. No, no, we are not satisfied, and we
will not be satisfied until "justice rolls down like waters, and righteousness
like a mighty stream."
I am not unmindful that some of you have come here out of great trials and
tribulations. Some of you have come fresh from narrow jail cells. And some of
you have come from areas where your quest -- quest for freedom left you battered
by the storms of persecution and staggered by the winds of police brutality. You
have been the veterans of creative suffering. Continue to work with the faith
that unearned suffering is redemptive. Go back to Mississippi, go back to
Alabama, go back to South Carolina, go back to Georgia, go back to Louisiana, go
back to the slums and ghettos of our northern cities, knowing that somehow this
situation can and will be changed.
Let us not wallow in the valley of despair, I say to you today, my
friends.
And so even though we face the difficulties of today and tomorrow, I still
have a dream. It is a dream deeply rooted in the American dream.