This video explains, How we actually live in our mind, not in this world. The reality is an illusion. We create our reality in our mind. Everyone sees the reality differently. The video also explains how we can control our mind to live a happy life and how we don't need the external world to be happy?
Our world is not outside. Our world is within our mind. Actually we see the image of this world inside our mind.
So everyone is living in his own world created inside his mind. It means there are as many worlds as there are living creatures on the Earth.

Friends, we do so many things in our life to make ourselves happy. We waste lots of our time, money and energy to seek happiness and pleasure in the external world.
But have you ever thought, why we need all this? What purpose does the external world solve?
Actually these external things don't do anything to make us happy. What they do is just trigger the secretion of various happiness hormones in our body and as a result, we feel happiness. And as you know, many times these objects fail to make us happy.

Got the point? Ok, let's take one more example to make it more clear.

When a woman Hugs her child and husband then different types of hormones may be released in the body of her child and husband. Although the woman is same but it is triggering different types of hormones in different bodies.
Why this happens? Actually the relationship of child and husband with that woman is different. So they have different types of feelings, beliefs and memories associated with the same woman. Therefore the same woman triggered the release of different hormones in the bodies of her child and her husband.

So what does it mean?
It means external world only helps in the secretion of different hormones in the body and the same object may trigger different hormones in different persons.
Everyone including humans and other animals see the world differently based on their intellectual level, past memories, body structure, sensory organs and other numerous factors.
You must have heard the famous line Beauty lies in the eyes of the beholder. For a mother her child is most beautiful in the world. There is no meaning of the external world unless there is someone to give it some meaning.
So now we understand, we actually live in our mind. External world is just a stimulant. But if we know that we actually live in our mind, then we can use other ways to achieve happiness.
It has been found that whatever pleasures and happiness you achieve by spending so much time, money and energy; can be obtained just by doing meditation. Doing meditation can release happy hormones like Serotonin, dopamine, oxytocin and endorphins.
You can remember good or bad memories in your mind and you will start to live in that time again. You will enter into the world that was present at that time.
Do you know, when we recall our old experiences, the same firing patterns of neurons are repeated in the brain that took place at that time.
So we actually start to feel that experience again. We enter into that time again and relive that life.
So we live in our mind.

What happens in your dreams.
When you dream, you are completely in a different world your dream world. You are completely unaware of your surroundings. Your world is in your mind.
Your brain can not differentiate between the dreaming state and the wakeful state. Therefore you laugh, cry, smile, feel fear and pain while dreaming. Your heart beat increases, body gets sweaty, hence you show all the symptoms as if you are living your dreams in reality. when you dream, you are totally unconscious of the external world and you actually live in your mind.
In the same way we can live any life just by clearly imagining and visualizing that life in our mind. On doing this, Neural network's circuit will be triggered accordingly and desired hormones will be released in the body. So we actually be living that life.

My dear friends, All the pleasures and suffering are in our minds not in the external world. We actually suffer our mind, not this world. Our world is in our mind and we are the controller of our mind. We need not to control the external world if we can control our mind.
If everything is ok inside our head then you will see all is ok with the external world too. But if there is some problem in your mind then you will see the whole world full of problems even if everything is totally ok in the world.
Actually you see events of the external world in your mind. And it's your brain that gives meaning to the meaningless events as per your perspective.
Keep it in mind, that your mind can be your biggest friend or biggest enemy. If it obeys you and takes your instructions then you can create your desired world. But If you can not control it, then your mind will start to control you.
World famous spiritual leader, Shri Shri Ravi Shankar says
“If you can win over your mind, you can win over the whole world.”