This is the message we have heard from him and proclaim to you, that God is light, and in him is no darkness at all. If we say we have fellowship with him while we walk in darkness, we lie and do not practice 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 cleanses us from all sin. If we say we have no sin, we deceive ourselves, and the truth is not in us. If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. If we say we have not sinned, we make him a liar, and his word is not in us.
My little children, I am writing these things to you so that you may not sin. But if anyone does sin, we have an advocate with the Father, Jesus Christ the righteous. He is the propitiation for our sins, and not for ours only but also for the sins of the whole world. And by this we know that we have come to know him, if we keep his commandments. Whoever says “I know him” but does not keep his commandments is a liar, and the truth is not in him, but whoever keeps his word, in him truly the love of God is perfected. By this we may know that we are in him: whoever says he abides in him ought to walk in the same way in which he walked.
(1 John 1:5-2:6 ESV)
While he was still speaking, there came a crowd, and the man called Judas, one of the twelve, was leading them. He drew near to Jesus to kiss him, but Jesus said to him, “Judas, would you betray the Son of Man with a kiss?” And when those who were around him saw what would follow, they said, “Lord, shall we strike with the sword?” And one of them struck the servant of the high priest and cut off his right ear. But Jesus said, “No more of this!” And he touched his ear and healed him. Then Jesus said to the chief priests and officers of the temple and elders, who had come out against him, “Have you come out as against a robber, with swords and clubs? When I was with you day after day in the temple, you did not lay hands on me. But this is your hour, and the power of darkness.”
Then they seized him and led him away, bringing him into the high priest's house, and Peter was following at a distance. And when they had kindled a fire in the middle of the courtyard and sat down together, Peter sat down among them. Then a servant girl, seeing him as he sat in the light and looking closely at him, said, “This man also was with him.” But he denied it, saying, “Woman, I do not know him.” And a little later someone else saw him and said, “You also are one of them.” But Peter said, “Man, I am not.” And after an interval of about an hour still another insisted, saying, “Certainly this man also was with him, for he too is a Galilean.” But Peter said, “Man, I do not know what you are talking about.” And immediately, while he was still speaking, the rooster crowed. And the Lord turned and looked at Peter. And Peter remembered the saying of the Lord, how he had said to him, “Before the rooster crows today, you will deny me three times.” And he went out and wept bitterly.
(Luke 22:47-62 ESV)