1 John 3v14 We know that we have passed from death to life, because we love our brothers. Anyone who does not love remains in death.
Let love be our first reaction to friends and our enemies so that we can show that we have passed from death to life in Christ. God showed great love to us in sacrificing His only son for our redemption, the least we can do is love as He did.
Matthew 5v46 If you love those who love you, what reward will you get? Are not even the tax collectors doing that? 47 And if you greet only your brothers, what are you doing more than others? Do not even pagans do that?