Yes, the more positive you think, the more positive things happen. It is the law of the universe, like law of gravity. If you visualise your life in a positive manner, you will realise positive things start happening around you. If you ask for positivity, you will get the same in abundance, if you ask for joy, you will get joy in abundance, if you ask for happiness, you will get happiness in abundance. Its like the universe conspires you to achieve all the good things. Energy flows where the focus goes. That is how our subconscious mind works.