The importance of purity cannot be overstated. Purity of your moral, mental and physical discipline will ensure that you get to the ultimate state of bliss. The seeker who stays committed to living a pure life certainly attains peace of mind, even if he fails at everything else.Here is a video discourse for you. The language is English. Following is an adapted snippet from the opening lines of the discourse:There is a word that can be found in most scriptures and yogic texts. A word without which your sādhanā, penance, is going to be incomplete. The word is purity. Your chances of success in any endeavor increase manifold when your actions and intentions are underscored by purity. Whatever you do, especially on the path of self realization, you cannot discount purity. What do I mean when I say pure? Does pure mean that you take care of your physical purity? Mental purity? Or, moral purity? All of these put together create what is called spiritual purity.
It is only in a state of spiritual purity that you are going to experience anything divine. Without purity of your discipline, it is not possible to rise above intellect. And till such time that you rise above intellect, you are not going to experience your true nature. What do I mean by moral purity or purity of discipline? You may practice severe austerities, they alone do not suffice. Imagine you buy a really expensive mirror. It renders images perfectly. Now, envision that you cover that mirror with a piece of cloth so that it no longer shows your own image. The covered mirror is unable to reflect. Same is the state of your mind, a covered (read conditioned) mind is unfit for impartial self reflection.