I am a subscriber to your 'A phrase a week' service and I was wondering if you could help me out with something that is stuck on mind since a couple of months. If you have seen the movie The Pursuit of Happiness there is a scene where Will Smith is talking to his son telling him about how he should never let anyone tell him he can't do something and he goes like," If you want something go get it. Period". I never really understood what adding 'period' to the end of a sentence meant. I thought you could help me out.