The power of thinking/prayer. Positive thoughts lead to positive actions. Angry thoughts, pity party thoughts, blaming others thoughts, lead to negative actions and thus negative consequences in your life.
This quote tells an important message; I feel like I often ignore this point and forget to live in the present and enjoy where I am. I am always worrying about the future and I need to start realizing that life is a journey and I can learn from my "path".