Bear in mind, consistency in this state will cause you to lose control, and even every joy in life to the point where you literally experience a form of hell, that is not meritorious, while on Earth. Satan waits, and when God allows you to be chastised, you will experience a real spiritual presence of evil, whether you believe it or not.
Basically, look at it this way. In life, even hypothetically without a God, there are only very few certain ways to live, in the conceptual outlook. One in particular brings you peace, even if not lasting sensual joy, and the other brings you only hate and misery. There is something mystical about life, no doubt about that, but only in a firm belief in God can you experience the gifts available and that peace. On the other hand, even without belief in anything, you will find that you go into eventual hate of everything, as those in hell experience. Nothing will hold lasting value, and even your memory of the day will be as nothing, because the day will be as nothing.
One day, you may find yourself punished, even if not today, and you may wonder why your free will and mind is compromised, whereas it used to not be before. You may become scrupulous, or begin to live only for the respect of others, which is an absolutely miserable way to live.
Bear in mind, in life outside the State of Grace, one cannot lastingly avoid sin and destruction,** and if God temporarily abandons you through your fault**, you may find yourself killed one day, or even may die through the continual act of mortal sin.
One day, when I was nineteen, I was so careless with my soul that I felt a tremendous cold sweat take over my whole body, and my whole presence of mind, conscience, and very life force was being dragged from me, out of me, and into the floor. I fortunately was in a blessed house, and my father was there. After begging for him to help me, I walked the thin line of determination and called out to God in a loud voice, thus ending my severe torment. Do not meddle in the affairs of apathy, for it will lead to extreme torment, even while living on this Earth.