What's the difference between atheists and "non-religious"?

The main goal of those under the influence of the sin nature is to make himself a god, to have complete control over his life, or so he thinks. Then religion comes along with obligations, judgments, and restrictions, while atheists presume to define their own meaning and morality. They do not want to submit to God because their hearts are at “enmity against God” and they have no desire to be subjection to His Law. In fact they are incapable of doing so because their sin has blinded them to truth (Romans 8:6-7). This is why atheists spend most of their time complaining and arguing not about the scriptural proof texts, but the “dos and don’ts.” Their natural rebelliousness detests the commandments of God. They simply hate the idea that anything—or any One—should have control over them. What they do not realize is that Satan himself is controlling them, blinding them, and preparing their souls for hell.