If there is an infinity of matter in the universe and an infinity of universes and an infinity of dimensions then it shouldnt be too difficult to imagine, assuming this is our state, that there is an infinity of forms we can take.
A soul may be in a constant state of growth. Given this, there could be an infinite amount of possibility of how powerful a soul can become.
We are all gods in different stages of growth.
In other words, "God" may in fact exist. It itself would be experiencing this state of growth and perhaps was once at our level of being.
One day we could grow to this point.
One day "God" will grow beyond it's current state of power and transcend even higher.
But as far as Jehovah goes? Impossible. It would be impossible for such an immature soul to acheive omipotence.