If Brown is very ambitious, and not very conscientious, he will take the bribe. If his conscience is stronger than his ambition, he will refuse it. But to say that he is free to choose is a misuse of terms: he is only free to decide as the stronger of the two motives compels him to decide. And the motives arise from heredity and environment.
Macbeth was ambitious; but he had a conscience. He wanted Duncan's crown; but he shrank from treason and ingratitude. Ambition pulled him one way, honour pulled him the other way. The opposing forces were so evenly balanced that he seemed unable to decide. Was Macbeth free to choose? To what extent was he free? He was so free that he could arrive at no decision, and it was the influence of his wife that turned the scale to crime.
Was Lady Macbeth free to choose? She did not hesitate. Because her ambition was so much stronger than her conscience that she never was in doubt. She chose as her over-powering ambition compelled her to choose.
And most of us in our decisions resemble either Macbeth or his wife. Either our nature is so much stronger than our training, or our training is so much stronger than our nature, that we decide for good or evil as promptly as a stream decides to run down hill; or our nature and our training are so nearly balanced that we can hardly decide at all.
In Macbeth's case the contest is quite clear and easy to follow. He was ambitious, and his environment had taught him to regard the crown as a glorious and desirable possession. But environment had also taught him that murder, and treason, and ingratitude were wicked and disgraceful.
Had he never been taught these lessons, or had he been taught that gratitude was folly, that honour was weakness, and murder excusable when it led to power, he would not have hesitated at all. It was his environment that hampered his will.
We may say that Wellington was free to take a bribe. But his heredity and environment had only left him free to refuse one. Everyone who knew the Iron Duke knew how his free will would act if a bribe were offered him.
We may say that Nelson was free to run away from an enemy. But we know that Nelson's nature and training had left him free only to run after an enemy. All the world knew before the event how Nelson's free will would act when a hostile fleet hove into view. Heredity and environment had settled the action of Nelson's free will in that matter before the occasion to act arose.
We may say that Nelson's will was free in the case of Lady Hamilton. But it seems only to have been free to do as Lady Hamilton wished.
When Nelson met an enemy's fleet, he made haste to give them battle; when he met Lady Hamilton he struck his flag. Some other man might have been free to avoid a battle; some other man might have been free to resist the fascinations of a friend's wife. Horatio Nelson was only free to act as his nature and his training compelled him to act. To Nelson honour was dearer than life; but Lady Hamilton was dearer than honour.