Due to the tendency of thoughts and emotions to repeat from one moment to the next, the state of happiness which is maintained in the present is most likely going to be the state of happiness that will be maintained in the near future. The result of this phenomenon is that of a repeating state of happiness that persists for as long as the same thoughts and emotions are considered.
Thus, a state of infinite happiness matching the precise degree of happiness which you allow yourself to maintain in the present is established that continues indefinitely until the decision to change this state arises. To make the most of this particular phenomenon, all that you must do is choose thoughts that produce the degree of happiness which you are most interested in maintaining indefinitely. As you establish a particular state of happiness by thinking thoughts of an equal desirability to that particular state, you will then experience that state of happiness for as long as you entertain thoughts and emotions that match it.