Robert's Father : "All men betray. All men lose heart."
Robert Bruce : "I don't wanna lose heart. I wanna believe as he does."
Robert Bruce has betrayed his perceived ally William Wallace by revealing his battle plans to the English. This betrayal is hard to stomach for Wallace because he had genuinely trusted and believed in Robert Bruce. He knows that his men fight for him because they are frightened of what he will do to them if they refuse. He sees that Wallace's men fight for him out of love, loyalty and respect, and because they see that there is real heart and soul in what he is trying to do. Robert believes that not only has he betrayed Wallace, he has also betrayed the part of himself that used to have the heart and the courage that Wallace does, and he does not want to lose that, or to give up on earning the love and respect of his men instead of the fear and the loathing.
There's a difference between us. You think the people of this country exist to provide you with position. I think your position exists to provide those people with freedom. And I go to make sure that they have it.
In many ways, this statement from Wallace is very similar to John F. Kennedy's speech where he urged people to "ask not what your country can do for you, but what you can do for your country." Wallace believes that the King views his subjects as a means to an end; they are the machinery that will continue to keep him in the monarchial life he is accustomed to. They will fight for him, see off foreign attackers, prevent treason from usurpers.
Wallace, on the other hand, believes that the job of the King is to keep his people free. King Robert should not be allying himself, and by definition, his people, with an English king who is eroding their freedoms; he should be fighting against this and allying himself with his people in an effort to defend their freedoms. Instead of seeing his people as an implement that keeps him in power, he should see his power as a tool that can keep his people free.
She was my wife. We married in secret because I would not share her with an English lord.
This is a reference to the Feudal laws recently implemented by Edward Longshanks, that gave feudal lords the right to sex with any young woman they pleased before the night of their wedding. Because William did not want to see his love raped by a nobleman the night before they married, their wedding was secret, so that the noblemen did not exercise this deplorable right.
