Answer:
"I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their character".
Step-by-step explanation:
The above stated phrase was taken from the Martin Luther King Jr.'s speech delivered on August 28, 1963, at the Lincoln Memorial, Washington D.C.
Said phrase is well-known for being the one with the strongest emotional connotation.