Lao Tzu has pioneered the concept of Taosim, which implies that good exist in bad, and bad exist in good. It is believed that life is very unpredictable and no man can actually vouch that life will be good and no bad event will ever occur. Like nature, life too is full of both bad and good events that what makes it most coherent. In relation to this, Lao Tzu ha explained observing harmony of nature through this balance of bad and good.