Yes, how we love each other (our brethren, our fellow Christ-ians) is how we are recognized by the world as Christ-ians, that we love each other as Christ loved and loves us. A Christ-ian (I spell it like this to sensitize us to what it is supposed to be) is someone who has received God's free gift of salvation through Jesus' blood and made Jesus Christ their Lord (God) and has set their hearts and minds on following Him to do God's will for their life daily. They are growing into the fullness of His love and THE blessing (Paul, Romans 15) and they study the Word and make it their final authority and will bind their lives to it and pattern themselves after it. They are the righteousness of God (Is 54, 2 Cor 5:17-21) and have the anointing, the same as Jesus. They are the same as Jesus is, now in this world (1 John 4:17).