Create an Abundance Mentality

I've been busy, and yes its challenging to frame my thoughts into something i consider, worthy to be written and remembered.
Here's one thing i been wondering over the past few days. Lets begin with two questions.
Have you ever come across someone who is rich but is never happy?
Or someone who is rather poor but live life of his own paradise? So much so that you admire his life?
Alright, don't get me wrong. I'm not saying staying poor makes you happy. It sure doesn't. We are all worthy to be rich and happy.
The contrast i'm trying to bring here is,
The Mentality.
Lets call the rich man "A" and poor man "B".
Or maybe if you already have the two person you in our mind know of even better. It will illustrate a even clearer picture.
Lets look at the random things they will say. Or if possible visualize these 2 person and recall the things they will say.
See the difference??
"A" is a complain king or if not a show off, attention seeker, or you can never see him satisfied with anything.
"B", however is someone who smiles and grateful about what he have. And you will do realise you are rather attracted to this person. He thinks differently and speaks of positivity to almost every situation.
Its the mind.
"A" are usually the narrow minder while "B" thinks in Abundance.
Now look, your mind frames your world. How you choose the way to see things will ultimately decide the feeling and emotions attached to it. Now let me tell you. Its not an easy thing. The best way i had realise to adopt to a broader mind is smiling. Everytime things happen, smile. It can be ironical, but trust me. Smile is free, and its the first step of intent of positivity.