G-d is One
One of the primary expressions of Jewish faith, recited twice daily in prayer, is the Shema, which begins “Hear, Israel: The L-rd is our G-d, The L-rd is one.” This simple statement encompasses several different ideas:
There is only one G-d. No other being participated in the work of creation.
G-d is a unity. He is a single, whole, complete indivisible entity. He cannot be divided into parts or described by attributes. Any attempt to ascribe attributes to G-d is merely man’s imperfect attempt to understand the infinite.
G-d is the only being to whom we should offer praise. The Shema can also be translated as “The L-rd is our G-d, The L-rd alone,” meaning that no other is our G-d, and we should not pray to any other.