I have a Christian friend who, as I understand it, doesn't believe in the 
Trinity.  One thing that makes me perhaps understand why is that Jesus said 
that He and The Father are One.  And He also asked The Father to keep those 
He gave Him, that they may be one in us.  What are the scriptures that make 
it clear that God is Three in One, and not just separate Persons? (She seems 
to make a distinction between "Jehova" and "Jesus", perhaps thinking that 
Jesus is not God.)

thanks for your thoughts.

Sharon