Which of Lincoln statements did not hold true?

One of Lincoln's statements that did not hold true was his assertion that the Union could not endure "half slave and half free," as the Civil War ultimately did not resolve the issue of slavery for good until the passage of the 13th Amendment. Additionally, his belief that the nation could heal quickly after the war proved overly optimistic, as Reconstruction faced significant challenges and divisions persisted for decades. These statements highlight the complexities and enduring struggles surrounding the issues of slavery and national unity.