In the second half of the 20th century, people are becoming more limited: Vocabularies are smaller, thoughts are smaller, aspirations are smaller, everything is very scaled down. Everyone is typecast.
What makes Superman a hero is not that he has power, but that he has the wisdom and the maturity to use the power wisely. From an acting point of view, that's how I approached the part.
What I do is based on powers we all have inside us; the ability to endure; the ability to love, to carry on, to make the best of what we have - and you don't have to be a 'Superman' to do it.