I think it's a very firm part of human nature that if you surround yourself with like-minded people, you'll end up thinking more extreme versions of what you thought before. ↗
Everything we know about human nature and about government tells us that individuals using their own money will achieve far more good for themselves and far more for others than politicians spending money they didn't have to work to earn. ↗
There was nothing in all Douglas's powerful effort that appealed to the higher instincts of human nature, while Lincoln always touched sympathetic cords. Lincoln's speech excited and sustained the enthusiasm of his audience to the end. ↗