"Happiness is simply the absence of desire. When you observe a cue, but do not desire to change your state, you are content with the current situation. Happiness is not about the achievement of pleasure (which is joy or satisfaction), but about the lack of desire. It arrives when you have no urge to feel differently. Happiness is the state you enter when you no longer want to change your state.
However, happiness is fleeting because a new desire always comes along. As Caed Budris says, “Happiness is the space between one desire being fulfilled and a new desire forming." Likewise, suffering is the space between craving a change in state and getting it.

happiness is not fulfilling every pleasure or getting every outcome you desire. happiness is being able to enjoy life with a peaceful mind that is not constantly craving more. it is the inner peace that comes with embracing change.

To be without desire is to be content. But contentment is not happiness. And in contentment there is no progress. Happiness is to desire something, to work for it, and to obtain at least a part of it.

Happiness is the abscence of the striving for happiness.

Do you want to know what happiness is? Happiness is the absence of unpleasant information.

Happiness, n. An agreeable sensation arising from contemplating the misery of another.

Happiness to me is mainly not suffering, not desiring, not thinking too much about the future or the past, really embracing the present moment and the reality of what is, and the way it is. [4]

Happiness is not to be achieved at the command of emotional whims. Happiness is not the satisfaction of whatever irrational wishes you might blindly attempt to indulge. Happiness is a state of non-contradictory joy — a joy without penalty or guilt, a joy that does not clash with any of your values and does not work for your own destruction, not the joy of escaping from your mind, but of using your mind's fullest power, not the joy of faking reality, but of achieving values that are real, not the joy of a drunkard, but of a producer. Happiness is possible only to a rational man, the man who desires nothing but rational goals, seeks nothing but rational values and finds his joy in nothing but rational actions.

Happiness is not having the best of everything, but the ability to make the best of anything. Happiness is knowing you are doing what you can with what you were given. Happiness is not something that comes to you when every problem is solved and all things are perfectly in place, but in the shining silver linings that remind us the light of day is always there, if you slow down enough to notice.

Happiness is the readiness to be happy.

happiness is being able to enjoy the things you worked for without slipping into thinking about what is missing or what you want next

Happiness is the indication that man has found the answer to the problem of human existence: the productive realization of his potentialities and thus, simultaneously, being one with the world and preserving the integrity of his self. In spending his energy productively he increases his powers, he "burns without being consumed.“

Happiness is the experience of living every moment with love, grace and gratitude.

Happiness is being satisfied with what you have.