Breathless

I think that this is a great quote.  This is a way of saying to always try your best.   You should want to strive to be the best of your capability so that other people want to follow in your footsteps.  Be that person who is extraordinary and leaves others breathless.  

Greatness

This quote is by the famous William Shakespeare.  It is obviously about greatness.  The best way that I break down the meaning is that we shouldn't be afraid, or fear, greatness.  I think it's saying that we are all great in some type of way.  Some people are born into the greatness and have natural talent to succeed.  Some people have to work really hard to work their way to success.  Lastly, some are in difficult situations and, while not expecting anything great, end up doing something that deserves recognition, or something pretty great in return.   

Don't Look Back

This quote reminds us that we shouldn't dwell on the negative things that happened in the past.  It's in the past, you can't go back and change things.  It happened and it's done.  All you can do is think of the future because that is the way  life goes.  Think of things you can change for yourself in the future to make things better instead of beating yourself up for something that you can no longer fix.  Be positive in life and worry about what life will bring.  

Be Happy

Since this quote was said by Anne Frank, it's talking about life.  After all of the horrible things that happened to her this is her way of living a strong life.  She doesn't think about her past and instead thinks about the things that she still has and everything or everyone she has around her.  We should all live like this.  Be happy with what you  have left rather than sad about everything bad that has happened to you in the past.