We are all mostly just one person.  Now some people are a little bit more, and some are a little bit less.  It is odd to be chuggin along your life and encounter a situation that causes you to step beyond who you normally are to be someone else temporarily.  I imagine that if you encounter enough of these situation... you might end up adding that part into who you are.  

Actions are often prompted by situations.. how you react is a defining moment in who you are..

Not always is this the case, if you act first you can avoid certain situations all together, again prompting a display of who you are.

You must act.  Thus, you must solidify who you are.  All I think I have to say from here is Act wisely.