The true light, which gives light to everyone, was coming into the world.
John 1:9 English Standard Version

I believe that Christ indwells all people.  He is the only one who can give enough light for anyone to even think of God. Anyone who is born into this world has been blessed with the presence of God, whose face we see in Christ.
In Revelation 3:20 Jesus says that he knocks on the door of everyone. I realize that the context concerns the church of Revelation but the words of Jesus may be applicable to anyone who is willing to listen to Christ’s voice.
I address now those who are aware of this light. Do not be fearful that this light has dimmed or even extinguished for Christ will not forsake any of us. There are times when as the song goes, ‘darkness veils his lovely face but still i rest on his unchanging grace.’ God’s grace is not extinguished in this world.  God is sovereign over his creation and nothing will stop that within your soul.  The light sometimes flickers by our own volition or sometimes God wants us to stretch further and look deeper within our souls for his light but it’s always there. Sometimes we just need to look or listen within our own souls for that light, that voice, that presence.  We live too much on the surface of life reacting to the stimuli outside us but not within us.