God is Triune, and Indivisible!  See the following for an Jewish perspective of the Triune nature of God as seen in the Tanach

In order to have a complete understanding, you need to read all nine responces!

1) - HaDavar Response Number One: The Two Views of the Rabbis

2) - HaDavar Response Number Two: Jewish Philosophy

3) - HaDavar Response Number Three: The Plural Noun Elohim

4) - HaDavar Response Number Four: The Name YHVH Applied to

Two Indivisible Persons

5) - NEW- HaDavar Response Number Five: Plural Language Describes God

6) - NEW- HaDavar Response Number Six: The Son of God

7) - NEW- HaDavar Response Number Seven: The God-Man

8) - NEW- HaDavar Response Number Eight: The Shekinah and The Ruach

HaQodesh (Holy Spirit)

9) - NEW- HaDavar Response Number Nine: The Shema