Those who are yogis, bhakta-yogis, because they are in love with God, Kṛṣṇa, they are seeing every moment within their heart the Supreme Personality … - A. C. Bhaktivedanta Swami Prabhupada

For him who has conquered the mind, the mind is the best of friends; but for one who has failed to do so, his mind will remain the greatest enemy.

Materialistic people are sometimes called sudras, or descendants of monkeys, due to their monkey like intelligence. They do not care to know how the evolutionary process is taking place, nor are they eager to know what will happen after they finish their small human life span. This is the attitude of sudras. Sri Caitanya Mahaprabhu’s mission, this Krishna consciousness movement, is trying to elevate sudras to the brahmana platform so that they will know the real goal of life. Unfortunately, being overly attached to sense gratification, materialists are not serious in helping this movement. Instead, some of them try to suppress it. Thus it is the business of monkeys to disturb the activities of the brahmanas.

Among all the luminaries shining in the sky, the sun is the chief, and in the Brahma-samhita the sun is accepted as the glowing eye of the Supreme Lord. There are fifty varieties of wind blowing in space, and of these winds the controlling deity, Marici, represents Krishna. Among the stars, the Moon is the most prominent at night, and thus the Moon represents Krishna. It appears from this verse that the Moon is one of the stars; therefore the stars that twinkle in the sky also reflect the light of the sun. The theory that there are many suns within the universe is not accepted by Vedic literature. The sun is one, and as by the reflection of the sun the Moon illuminates, so also do the stars. Since Bhagavad-gita indicates herein that the Moon is one of the stars, the twinkling stars are not suns but are similar to the Moon.