1 John 3:10, 14-15

Here is how God’s children can be clearly distinguished from the children of the Evil One. Anyone who does not demonstrate righteousness and show love to fellow believers is not living with God as his source.

Yet we can be assured that we have been translated from spiritual death into spiritual life because we love the family of believers. A loveless life remains spiritually dead. Everyone who keeps hating a fellow believer is a murderer, and you know that no murderer has eternal life residing in him.