How did lincoln approach the issue of slavery in his speeches?

Lincoln was very careful in his speeches regarding slavery not to antagonize the South. He made it clear that he didn't want to end slavery where it existed, only stop it from spreading. 
btw I found this answer by him:HistoryGuy

so dont report commment just wanna help out

If he breaks the law then he had to resign from his post and so he'll lose his/her powers.

The answer is forindependence.