How often we find people who have not much material properties but are happy, jolly, radiant & blissful human beings. This is because their inner world of thoughts, emotions and feelings is stable. They are grateful for what they have and they think only inspiring happy thoughts.
By seeing the external world of a person, his inner world can be predicted. You find a person is miserable and chaotic only because his thoughts, feelings and emotions are also chaotic and turbulent. On contrary, if a person is optimistic, energetic and peaceful, it refers that his thoughts, feelings and emotions are also optimistic, energetic and peaceful.
In other words, what you create in your inner world you create in your outer world
So choose your thoughts, words, emotions and feelings wisely as they are only going to manifest in your outer world.
It take persistent effort and time to make it a habit.
Once the habit is formed, life becomes a flow and you enjoy every moment of it.