In the gettysburg address, what emotion did president lincoln try to tap into when he spoke about the principles the country was founded on?

The emotion that  President Lincoln try to tap into when he spoke about the principles the country was :A feeling of patriotism

Patriotism refers to the behavior that provide supports to our own country. Abraham Lincoln's purpose in tapping into the feeling of patriotism during  the Gettysburg address was to gained citizen's support on the union's effort to abolish slavery in southern states

In the Gettysburg Address, when President Lincoln spoke about the principles the country was founded on he was trying to tap on American patriotism.

Explanation:

The Gettysburg Address is the most famous speech by President Abraham Lincoln. It was pronounced in the Dedication of the Soldiers' National Cemetery in the city of Gettysburg, Pennsylvania, on November 19, 1863, four and a half months after the Battle of Gettysburg during the Civil War. Although Lincoln's carefully worded speech was secondary to other speeches of the day, it has been considered later as one of the greatest speeches in the history of mankind, or, at least, one of the most famous and cited of the modern era. Invoking the principles of equality of men enshrined in the Declaration of Independence, Lincoln redefined the Civil War as a new birth of freedom for the United States and its citizens.

no because we were not ready for war