1 John 1:5 reads, This is the message we have heard from Him and declare to you: God is light; in Him there is no darkness at all. If we claim to have fellowship in Him yet walk in the darkness, we lie and do not live by the truth.
Are we living in the light or the darkness? If we live at least part of the time in the darkness, we are not a Christian. A Christian will seek truth and light.