Suggestions for further reading on this topic

Bailey, Alice A. From Bethlehem to Calvary (New York: Lucis 
Publishing Co., 1937)

Besant, Annie. Esoteric Christianity (Wheaton, IL: Theosophical 
Publishing House, 1901)

Carey, Reverend Howard. The Joy of Christ's Coming: From 
Traditional Religion to Ageless Wisdom (Amsterdam: Share 
International Foundation., 1988) This book is not currently available in hard copy form. It may be downloaded from the above link.

Creme, Benjamin. The Reappearance of the Christ and the Masters of  Wisdom. Also: Messages from Maitreya the Christ (Los Angeles: Tara  Center, 1980)

Errico, Rocco A. Let There Be Light -- The Seven Keys (Marina del 
Rey: DeVorss & Co., 1985) 

Hodson, Geoffrey. The Hidden Wisdom in the Holy Bible, Vol. I,
(Wheaton, IL: Theosophical Publishing House, 1967)

Lamsa, George M. (translator), The New Testament -- From the 
Ancient Eastern Text (New York: Harper & Row, 1933)