To spread the mission of God is the prime duty of all the followers of Islam. To perform this duty, one should first attain knowledge of oneself. Knowing oneself, the knowledge of oneself, leads to the spiritual success in which a person becomes the true picture of what he preaching. Whatever he says is proven by his acts and character. Such a person becomes a good example of his preaching as he begins to impart religious and spiritual things to people. God does not like it when those who are guiding and instructing other people are not following those teachings themselves. Prophet Muhammad (P.B.U.H) has terrified with severe punishment those who do not follow their own teachings.