Atheism is a self-imposed handicap; and, the atheists are completely blind to it.
They think they are intelligent and wise, smarter and more logical and more realistic than the rest of us; but, in order to achieve their atheism, they literally have to dumb themselves down, refuse to look and read and study, lie to themselves about their conclusions, stick their head in the sand, develop selective amnesia, and pretend that there is no evidence for God's existence until they truly believe that there is no evidence for God's existence.
Only those of us on the outside, those of us willing to look at and study the evidence for God's existence, can truly see how dumbed down, handicapped, and blind the atheists have made themselves. They are blind to what they have done to themselves, thinking it to be intelligent and wise and genius. Only those of us on the outside, those of us who have found God, can truly see and understand how severely the atheists have handicapped themselves through their unwillingness to look, and see, and learn, and grow.
The atheists handicap themselves by refusing to grow unto God, by refusing to grow unto Godhood. By denying the divinity of Jesus Christ, the atheists lose the ability to become Christ-like, a very severe handicap indeed.