Buddha stated that happiness is not found in a set of circumstances, but is found in a set of attitude. An easy way to find unhappiness is to grumble and complain about life. When the mind is focusing on the positive with gratitude, it is difficult to complain, and hence, happiness naturally flows through us.
Mind & Spirit
“Consciously or unconsciously, every one of us does render some service or other. If we cultivate the habit of doing this service deliberately, our desire for service will steadily grow stronger, and will make, not only our own happiness, but that of the world at large.” ~ Mahatma Gandhi -1869-1948, Indian Political and Spiritual Leader