Regarding your other question, should we become detached from the results of our activities, or should we become simply attached to the Lotus Feet of Krishna, the answer is that both of these philosophies are right. One should not be attached to his personal achievement. But, if one is attached in order to please his Spiritual Master, then it is all right. Unattached to my benefit, attached to Krishna's benefit. Krishna Consciousness means attachment for Krishna and detachment for personal benefit, that's all.
Letter to Sri Govinda, 25 December, 1972