• God The Father
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• Father
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• Children

Abba - a Christian perspective
One of the most amazing aspects of the Christain faith is God's adoption of us as His children. As His children, we have the right to call him "Abba"--father.
http://biblegateway.com/passage/?search=Galatians%204:6&version=NIV

"Father" in the Bible: Romans 8:15
Key to the Christian faith is the belief that, when we're saved by Christ, God embraces us as His children. Not slaves to be abused and bossed around; not servants who must obey or be dismissed. Rather, God gives us the privilege of calling Him our Father. Consider a father's love for his children--and how much greater is God's love for His children.
http://biblegateway.com/passage/?search=Rom.8.15&version=NIV