What four specific ideas does Lincoln ask his listeners to commit themselves to at the end of his speech?

At the end of his speech, Lincoln calls on his listeners to commit themselves to four specific ideas: to ensure that the nation remains united, to uphold the principles of liberty and equality, to honor the sacrifices made by those who fought in the Civil War, and to work towards a "new birth of freedom" that would secure the rights of all citizens. He emphasizes the importance of perseverance in achieving a government "of the people, by the people, for the people." These commitments aim to inspire hope and foster a sense of responsibility for the future of the nation.