Just backing up R.Lewis's comments. More does not equal better, and can often be detrimental to achieving your goals.
its all a balancing act...just enough time spent in the gym to trigger the muscles to want to grow, then time out of the gym so they can actually recover, repair, and grow bigger/stronger.
if all you do is hit the gym to trigger growth, but dont' allow the growth through recovery time, there will be no growth.