The quote itself means that in life you are given choices and this defines who you will become morally. You choose who you are and if you choose to be bad than you are the villain, alternatively, if you choose to be good then you are a hero.
We are all faced with the choice of being good or bad but you only you can choose what you wish to do.
A quote from the "Batman: dark knight" movie 2008. The quote is made by the character harvey dent.