Prabhupada repeatedly told the devotees that this process of Krishna Consciousness, we have to be conscious. We have to be quite conscious about what we are doing. If we are doing things mechanically, we do things without thinking and how to please Krishna by those activities, we tend to become careless and make mistakes. If our mind is thinking about sense gratification and not in the meaning of the service we are given, then we also tend to be unconscious about what we are doing. And then mistakes start to happen.
His Holiness Jayapataka Swami Maharaj
1990, July 22nd, SB class, @ Hyderabad, India