The moment you start thinking about new things you want to explore in life and take yourself to the next level at the same moment you start getting new ideas, thoughts and you start to express those emotions in the form of action.
It could be your thought of earning a side income and making passive money by using your skills and knowledge. This is necessary and important because this triggers action and you start to move in a direction you give yourself goals and targets.
Many a times people feel happy and content the way they are living their lives because they fear getting out of their comfort zone. They put restrictions on their thought process and stop to think big in life. This is where they stop their own personal growth.
So the idea is to think big in life and be comfortable in getting out of your comfort zone.