You are incredibly vague but Abraham Lincoln gave many speeches throughout his lifetime, but one of his most famous collections of speeches is the Lincoln-Douglas Debates. These are what im gonna assume you're asking about. If not feel feel to respond.
In these debates, Lincoln argued about a variety of issues related to the expansion of slavery in the United States. Here are five of the main points that he argued during these debates:
1. Slavery should not be allowed to expand into new territories and states.
2. The idea of "popular sovereignty," or letting individual states decide whether or not to allow slavery, was flawed and would only lead to more conflict.
3. Slavery was morally wrong and went against the principles of the Declaration of Independence.
4. The idea that African Americans were inferior to whites was a myth perpetuated by slave owners and others who benefited from slavery.
5. The United States was founded on the idea of equality, and allowing slavery to continue would undermine that principle.
These were just a few of the many arguments that Lincoln made during the Lincoln-Douglas Debates, and throughout his career as a politician and leader.