How does Martin Luther king use Abraham Lincolns words to explain his point in his speech?

I Have a Dream, speech by Martin Luther King, Jr., that was delivered on August 28, 1963, during the March on Washington. A call for equality and freedom, it became one of the defining moments of the civil rights movement and one of the most iconic speeches in American history.

Martin Luther King, Jr. often spoke of Abraham Lincoln in his speeches and writings, recognizing Lincoln's accomplishments, most notably his writing and signing of the Emancipation Proclamation. ... Later that same year, King gave his famous “I have a Dream” speech on the steps on the Lincoln Memorial.