Is it a pagen symbol ? No .
That symbol is called the "Triquetra" and has long been a symbol of the Trinity -- a foundational doctrine of Christianity. it symbolizes the Holy Trinity .
The Triquetra is actually printed on the spine of all New King James Version (NKJV) Bibles, and you can also find it in the architecture and stain glass windows of many historical churches. Although that symbol may have had Celtic origins as some New Agers claim, it was assimilated and converted to Christianity in Great Britain about 1000 years ago, in the early 1100's, and has been primarily a symbol of the Trinity for the last 800 years. In a similar way that the feast days that became Christmas and Easter were originally assimilated and converted from pagan rituals so they now celebrate the birth and bodily resurrection of Christ.
We asked Dr. Ron Rhodes, formerly of the Christian Research Institute and "Bible Answer Man" radio program, for his take on the logo, and he said:
"I can't say I've done any kind of historical study on the triquetra, but I am in agreement with you. I am not aware of any occultic relationship that this symbol has, and certainly the New King James Version cannot be undermined by its use of the symbol (The NKJV is a fine translation.)"
We're obviously not pagans. And we're not trying to send mixed messages. Please note that New Agers sometimes also use crosses (and not always upside down ones, either), and that doesn't take away the power and significance of the cross, either. In the same way, to us and to the church of the last 1,000 years, the Triquetra symbolizes the divine mystery of the Trinity -- one God in three persons, the Father, the Son and the Holy Spirit.