He (JESUS) is the atoning sacrifice for our sins, and not only for ours but also for the sins of the whole world. – 1 John 2: 2
But you have an anointing from the Holy One, and all of you know the truth. I do not write to you because you do not know the truth, but because you do know it and because no lie comes from the truth. Who is the liar? It is whoever denies that Jesus is the Christ. Such a person is the antichrist—denying the Father and the Son. No one who denies the Son has the Father; whoever acknowledges the Son has the Father also. – 1 John 2: 20-23
The truth is that we all have sinned, and we are too weak on our own to deal with our sinful flesh. Thus, JESUS – ‘the atoning sacrifice’ was offered on the Calvary for each one of us to be forgiven! This is an awesome thing! Anybody on the face of this earth is a child of God through His son, Jesus Christ.