1 John 2:3 – 6
New International Version (NIV)
Love and Hatred for Fellow Believers
3 We know that we have come to know him if we keep his commands. 4 Whoever says, “I know him,” but does not do what he commands is a liar, and the truth is not in that person. 5 But if anyone obeys his word, love for God is truly made complete in them. This is how we know we are in him: 6 Whoever claims to live in him must live as Jesus did.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=1 John 2:3-6&version=NIV
NIV®