Zen Buddhism originated in China from the Mahayana school of Buddhism and dates back to about 520 CE. It is widely practiced around the world and has had a recent surge in interest in the United States, particularly from the Japanese Zen tradition. It is essentially about the quest, through meditation and other forms of ritual and practice, for a state of being fully at peace with your thoughts as well as your place in the universe, which is seen as at once inconsequential and essential.
When you can sit with your whole body and mind, and with the oneness of your mind and body under the control of the universal mind, you can easily attain this kind of right understanding. Your everyday life will be renewed without being attached to an old erroneous interpretation of life.