The Orthodox Icon depicts the devil in black color, small in size. By this depiction, it shows that it lost its light and true life, being separated from the primary light. Atheism or separating oneself from God is not a like changing one's principles. It is a matter of life or death. Let us then stand upright in order to remain in the sphere of the first light.
Isolation is darkness, and atheism is death.
This shout is necessary today and always will be necessary for us. We are free beings, able to love God or oppose Him. Adam repeated the mistake of Lucifer, and the Prodigal Son is an example for us in order not to be in the sphere of darkness but in the true light. The sphere of darkness is the evil sphere of wicked actions. The evil actions want us to believe that we can live apart from God.