“take heed that the light which is in you is not darkness.” Luke 11:35
We can look good on the outside. Say the right words and appear to walk in holiness. However, what is within is what matters. If you have secret sins (pornography, adultery, sexual immorality, addictions, lying), you may be in darkness, preventing you from seeing and following the truth. “But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin.” 1 John 1:7