I believe in the Great Creator God (Yahweh); I believe in Jesus Christ; I believe in the Holy Spirit. I believe these embody the God Family that created and sustains the Universe. I base this belief on the statement in Genesis concerning the words "Us" and "Our": (emphasis mine):
“Let Us make man in Our image, according to Our likeness; and let them rule over the fish of the sea and over the birds of the sky and over the cattle and over all the earth, and over every creeping thing that creeps on the earth,” (Gen. 1:26, NASB).
I also believe that it is up to every individual themselves to prove what they believe and not accept anyone's interpretation. The Bereans did this consistently to prove all things.