If you're trying to achieve, there will be roadblocks. I've had them; everybody has had them. But obstacles don't have to stop you. If you run into a wall, don't turn around and give up. Figure out how to climb it, go through it, or work around it.
I've also worked hard portraying an Ireland which is fast disappearing. Ireland was a very depressed and difficult place in the 1980s, and I've tried to include that in the script. I worked really hard to find the heart of the book.
I don't think my principles change. I think the way in which you apply those principles to modern society changes.