here are some quotations:
"The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature." ~ Marcus Aurelius
"Happiness is a journey, not a destination; happiness is to be found along the way not at the end of the road, for then the journey is over and it's too late. The time for happiness is today not tomorrow." ~ Quoted by Paul H Dunn
The Dali Lamma says something similar. Happiness is not the destination but the way and the path to the destination.
Like @Evee said in his beautiful summary/poem....
Happiness cannot be grabbed or wrestled in to submission. I believe one must meditate or subdue happiness gently or let happiness subdue oneself.
Try meditating ten minutes a day for a few months and I think you will be delightfully surprised. Research different meditation techniques and pick the one best for you.