Not develop real purpose of religion
At the present moment, one professes a type of religion, but does not develop real purpose of religion, namely love of Godhead—that is materialism.
Letter to Sri Birlaji -- Los Angeles 23 April, 1970: Actually there is nothing like materialism. Materialism means forgetfulness of Krishna or God. We are preaching therefore Krishna Consciousness. In the Srimad-Bhagavatam it is said that the first-class religion is that which teaches love of Godhead. At the present moment, one professes a type of religion, but does not develop real purpose of religion, namely love of Godhead—that is materialism. Materialism does not mean that one has to possess so many things, the actual fact is one may be a perfect transcendentalist of spiritual man by possessing the whole world, and one may be a gross materialist without possessing a farthing. So this distinction can be made on the basis of consciousness. When one is Krishna Conscious possessing everything in the world, he is perfect spiritualist, and one may have renounced everything in the world, but lacking in Krishna Consciousness he is a gross materialist. In my recent publication of Isopanisad I have tried to explain this fact on Vedic authorities, and I am sending by separate Air Parcel one copy of Isopanisad and I hope you will read this book conveniently with interest.