How can I maintain purity after practicing meditation?

Be aware of every thought, word and action. Whatever you take within should be pure. What is pure? Something which is not selfish. Something which is selfless. No rituals can bring that purity. Selfless actions elevate man to the highest. The emotional trash that we carry over lifetimes is the primary cause of terrestrial entanglement. Liberation is impossible unless this trash is completely removed. Prevention of further accumulation is essential prior to the effort for disengagement from it. Awareness is key.