Obeys his word and loves their brother and sister

1 John 2:1-11
Jesus Christ, the Righteous One. He is the atoning sacrifice for our sins, and not only for ours but also for the sins of the whole world.
if anyone obeys his word, love for God is truly made complete in them. This is how we know we are in him: Whoever claims to live in him must live as Jesus did.
This old command is the message you have heard. a new command; its truth is seen in him and in you, because the darkness is passing and the true light is already shining.
Anyone who loves their brother and sister lives in the light, and there is nothing in them to make them stumble.
What we have Jesus - the one through whom we are forgiven - to plead our cause.
Why?
How can we be sure that we really know God? To know is to obey. So the first test is obedience. If we obey God's commands. If we live as Jesus did, we can be sure.
The second test is love. Living in God's light means keeping the old-and new command to love one another (the 'new command' Jesus gave his disciples which John knows these Christians have already been taught).
Claim and live out the truth are different matter. Many are obey in the mouth, but John taught us the we have to obey God's command, love for God is truly made complete in them.
Love is another symbol of Christian. with love people will know we are belong to the Jesus Christ. It is not the problem of Christ, but for our behavior did not show the love of Christ.
How?
Fully obey God's command and love one another in the church and love others as I can.
To know is to obey: To know the word of God and studying Bible is let us obey word of the Lord. To be a real Christian.