That on the first day of January, in the year of our Lord one thousand eight hundred and sixty-three

all persons held as slaves within any State or designated part of a State,

the people whereof shall then be in rebellion against the United States
shall be then, thenceforward, and forever free;

and the Executive Government of the United States, including the military and naval authority thereof

will recognize and maintain the freedom of such persons

and will do no act or acts to repress such persons, or any of them, in any efforts they make for their freedom
Mean: Rewrite the phrase to show what it means.