Money is very important in life, but without the presence of happiness, life would feel very empty even with all the wealth the world has to offer.
~ Hafiz
Some things could come into in your life through luck, but happiness is undoubtedly not one of them. The activation of happiness in one's life is impossible without the presence consistent positive thoughts and beliefs in one's mind.
The presence of happiness doesn't require continuous positive experiences, it only demands frequent positive interpretations of one's experiences.
When you adopt the habit of focusing on the things in your life that some people would love to have or experience, you would develop the spirit of gratitude, which would then guarantee a continuous presence of happiness in your mind.