Shudras does not require any training. Shudra means no training. Ordinary worker class. Otherwise other three, especially two, namely the Brahmins an… - A. C. Bhaktivedanta Swami Prabhupada

The floating of the planets in the weightless air is due to the inner constitution of the globes, and the modernized drilling of the earth to exploit oil from within is a sort of disturbance by the modern demons and can result in a greatly harmful reaction to the floating condition of the earth.

The Moon is also on the level with the heavenly planets, and only persons who have performed virtues only — performing sacrifices, giving charity and undergoing severe austerities — can be allowed to enter into the heavenly planets after the duration of life of the body. Arjuna was allowed to enter into the heavenly planets in the selfsame body simply by the grace of the Lord, otherwise it is not possible to do so. The present attempts to enter into the heavenly planets by the modern scientists will certainly prove futile because such scientists are not on the level of Arjuna. They are ordinary human beings, without any assets of sacrifice, charity or austerities.

Sometimes he becomes a great hero -- just Hiranyakashipu and Kamsa or, in the modern age, Napoleon or Hitler. The activities of such men are certainly very great, but as soon as their bodies are finished, everything else is finished.