Happiness is pure and unadulterated joy. It is free from side effects and free from the slightest bit of suffering. As much as we appreciate the pleasure of: sitting by the sea, watching the sunset, cruising along the river, being a parent, receiving a promotion or buying beautiful things for ourselves, we know that deep down these things all come with a certain amount of cost (thinking, planning, problem-solving, maintenance and sometimes even stress). Pleasure requires us to take action (to do something), whereas pure happiness asks us to do absolutely nothing.
That is because pure happiness relies on nothing. The presence (or absence) of a particular person, possession or circumstance are not the conditions of happiness. Pleasure is short-lived and relies on external factors, on other people and things outside our control.
This does not mean that we should deny all pleasures. It means that we need to know what real happiness is, where it comes from, and how we can have it. There have been and there always will be times when we realize, temporarily, that all the external possessions and the lovely pleasures cannot lift us out of emotional suffering. Even a nice house, a six-figure salary or a diamond ring cannot prevent love from ruin or save us from heartache. We feel happiness in the mind. It comes from the mind.
To be specific, happiness comes from the center of the body, the natural home of the human mind. Most of us cannot find happiness because we look for only pleasure. We look for happiness on the outside. Sometimes we even feel empty inside, despite owning a new car, a new house and all the beautiful things that money can buy. Sometimes, we work so hard and spend so much time to get all these things for ourselves or for others, to win their hearts. We think that they will make us happy or will return our love. Other people still expire, malfunction or die. They leave us in a most unkind and unexpected manner. We wonder why they left. Then we realize that none of these things can help us when we are worried, depressed or in pain. We will truly appreciate this fact and the difference between happiness and pleasure, only when we have experienced pure happiness.