According to Lincoln, why was the sacrifice made by the soldiers at Gettysburg worth the price they paid?

According to Lincoln, why was the sacrifice made by the soldiers at Gettysburg worth the price they paid? They died to protect American democracy.

Explanation:

the pogroms became known as kristallnacht, the "night of shattered glass," for the shattered glass from the store windows that littered the streets. the morning after the pogroms 30,000 german jewish men were arrested for the "crime" of being jewish and sent to concentration camps, where hundreds of them perished.