Dead Poets Society

1. Neil starts as a constrained young man and becomes fully self expressed when presiding over the sessions of the Dead Poets Society and playing the role of Puck on stage in A Midsummer Night's Dream. His way of being illustrates this transformation. 
2. Knox is a static character. He doesn’t undergo any kind of self-realization like Todd does. He just throws himself into love and uses that as his interpretation of "carpe diem". Knox's "object of desire" is Chris. His entire existence, including his thoughts, poems and behaviour, revolves around her. He breaks rules to see her and competes for her attention with her boyfriend.
3. Mr. Keating's character is an optimistic out of the box thinker.