In layman's term, Zen meditation is letting go of pessimistic thoughts and simply relaxing. In Buddhism, it is a contemplative discipline performed to achieve calmness in the mind and body. Most importantly, it aims for a practitioner to understand the nature of life to obtain enlightenment. To fully experience positive results of Zen meditation, there are three general methods to consider such as Concentration; Koan Introspection; and Shikantaza.
When someone lacks self-respect, they live their life miserably. They shoulder the burdens of regret, shame, loathing and blame. They are prone to engaging themselves to self-destructive behavior because they have little value for themselves.