Definitions:
God is defined as The Conscious First Cause - ala St. Thomas Acquinas
The First Cause is That which caused Time.
Consciousness is that which lets one make a decision.
A Decision is the action of changing ones mind from undecided to decided. Time is the measure of change.
Premises:
Something which is caused can't be required by that which causes it.
Conclusions:
Time is required for Change.
A Decision is a Change.
Decisions require Time.
Consciousness can't let one make a decision without Time.
Consciousness requires Time.
God is Conscious.
God requires Time.
God can't be the cause of Time if God requires Time.
God isn't the cause of Time.
God isn't The First Cause.
If God isn't The Conscious First Cause then God doesn't exist.
God doesn't exist.