"When a thinker follows a line of implication, the course of his thought is conditioned by the necessity in his subject matter, but far from being humiliated when he realizes this, he finds in it a ground of pride. For a rational being to act under the influence of seen necessity is to place himself at the farthest possible extreme from the behavior of the puppet. For a moral agent to choose that good which in the light of reflection approves itself as intrinsically greatest is to exercise the only freedom worth having. In such cases the line of determination runs through the agent's own intelligence. To think at its best is to find oneself carried down the current of necessity. To choose most responsibly is to see alternative goods with full clearness and to find the greatest of them tipping the beam. This, in a way, is to be determined. But there is nothing mechanical about it. For it is what the rational man means by freedom."
This is one of those book that after reading it you wished that you had read it years before. It would have made the reasoning of others more understandable, even when you do not agree.