"If the light you think you have is darkness, how deep that darkness is."

These chilling words came right from Jesus in Matthew 6:23.

And I don't know about you, but I sure don't want to be the person He is talking about.

So, how do we know if we are truly walking in the light? How do we keep from deceiving ourselves?

We get the answer all throughout the book of 1 John. Over and over again, he gives us the primary indicator.

If we are living in the light, as God is in the light, then we have fellowship with fellow believers.

If we are at odds with another believer, we can be sure we are not walking in the light.

If we are resistant to gathering with other believers, we can be sure we are not walking in the light.

That's probably not what you expected, is it? Yet, it's the truth. This is how you know if you are truly walking in the light.

Otherwise, that light you think you have... It's actually darkness.