A Man for All Seasons struggles with ideas of identity and conscience. Sir Thomas More argues repeatedly that a person is defined by his conscience.
Some quotes :
1. "Norfolk: Look, I am not a scholar, and frankly I don't know whether the marriage was lawful or not — but Thomas, look at these names! You know these men! cannot you do as I did and come along with us for fellowship?
More: And when we stand before God, and you are sent to Heaven for doing according to your conscience, and I am sent to hell for not doing according to mine, will you come along with me — for fellowship?"
2. More : " God made the angels to show Him splendor, as He made animals for innocence and plants for their simplicity. But Man He made to serve Him wittily, in the tangle of his mind. If He suffers us to come to such a case that there is no escaping, then we may stand to our tackle as best we can, and, yes, Meg, then we can clamor like champions, if we have the spittle for it. But it's God's part, not our own, to bring ourselves to such a pass. Our natural business lies in escaping. "
3. Sir Thomas More: Why not be a teacher? You'd be a fine teacher; perhaps a great one.
Richard Rich: If I was, who would know it?
Sir Thomas More: You; your pupils; your friends; God. Not a bad public, that.