Abraham Lincoln was a great speaker. As a great speaker, he understood the importance of sentence stress. In his own copy of his famous "House Divided" speech, he underlined words to stress when speaking. Here is his text. To practice English sentence stress, it might be a good id to practice saying it while putting stresses where he marked them.
I believe this government cannot endure, permanently half slave and half free.
I do not expect the Union to be dissolved -- I do not expect the house to fall -- but I do expect it will cease to be divided.
It will become all one thing or all the other.
Either the opponents of slavery, will arrest the further spread of it, and place it where the public mind shall rest in the belief that it is in the course of ultimate extinction; or its advocates will push it forward, till it shall become alike lawful in all the States, old as well as new -- North as well as South.