Our program is to enter into the association of Krishna. But we cannot enter within this association without being completely disinfected from the contamination of material sinful life. It is confirmed in the Bhagavad-gita by Lord Krishna Himself that only those who are absolutely cleansed of all dirty sins can be engaged in Krishna Consciousness in full swing. In other words, those who are fully in Krishna Consciousness can be free from material contamination and thus enter into association of Krishna.