What lesson can we learn from Creon's bravery?

This is an interesting question because Creon is usually not a character who is associated with bravery. Typically, Antigone is seen as the heroine in this story, even though her bravery ultimately leads her to her grave. However, Creon demonstrates firm leadership capabilities, and this could be construed as bravery. Creon's firmness is criticized, even by his own son, but Creon nevertheless shows classic Greek attributes that are associated with being a strong patriarch. 

It could be helpful to view "braveness" under the Greek framework of hubris. In Greek society and literature, hubris is often defined as extreme pride. This pride is usually punished by the gods, and characters who demonstrate hubris often lose the things that are most precious to them. In Creon's case, his hubris - or bravery - costs him to lose his son. Antigone teaches us that bravery sometimes comes at a cost. Instead, we should be patient and flexible, especially when listening to the needs of others.