Why was Lincoln reluctant to give up fort Sumner?

Lincoln was reluctant to give up Fort Sumter because it symbolized federal authority and the Union's commitment to maintaining its integrity. Surrendering the fort would be seen as a concession to the Confederacy and could encourage further secession by other Southern states. Additionally, Fort Sumter was strategically important for controlling access to Charleston Harbor, making its retention crucial for the Union's military strategy. Lincoln believed that holding the fort would help to rally support for the Union cause.