Sentence:  If the universe shows God to be a great thinker, there is good reason why we should take the next step, and affirm that God is also a great <WSD>Willer</WSD>. First of all, we do not know anything about thinkers that are not <WSD>willers</WSD>. Thought, so far as we have ken of it at all, is always accompanied by volition. 
Meaning of the word marked with <WSD> tags:  One who wills; who causes by an act of will or willpower.