Authentic is the meaning of the word sincere in this verse. 1 Peter 1:22 says, “Since you have purified your souls in obeying the truth through the Spirit in sincere love of the brethren, love one another fervently with a pure heart.”

1 John 2:11 says, “He who loves his brother abides in the light, and there is no cause of stumbling in him.” The apostle John wrote those words because He remembered Jesus’ words in John 3:21. It says, “But he who does the truth comes to the light, that his deeds may be clearly seen, that they have been done in God.”

Paul wrote to the church in Ephesus about that. Ephesians 5:1-2 says, “Therefore be imitators of God as dear children. And walk in love…” Verse 13 says, “But all things that are exposed are made manifest by the light, for whatever makes manifest is light.”

The high watermark of a believer is one who remains in the light. Mark 4:22 says that things are only hidden that they may be revealed. Walking with other light-dwellers purifies.