He was saying the freedom was going to apply for everyone in the nation such as slaves, and that the government is never going to go anywhere, and that the constitution will forever stand.
In that passage of his speech, Lincoln gives an accurate definition of democracy as "government of the people by the people for the people." It affirms that the victory of the Union in the Civil War would contribute to maintaining democracy as the predominant political system in the United States, and that as such, the United States and its people would not allow it to disappear from the face of the earth.
