The more one advances in sattva-guna, the more his brilliance is exhibited by devotional service, but the more one is covered by rajo-guna and tamo-guna, the less visible his brilliance, for he is covered by these qualities

Expressions researched:
"the more one advances in sattva-guna, the more his brilliance is exhibited by devotional service, but the more one is covered by rajo-guna and tamo-guna, the less visible his brilliance, for he is covered by these qualities"

SB Canto 7

The more one advances in sattva-guṇa, the more his brilliance is exhibited by devotional service, but the more one is covered by rajo-guṇa and tamo-guṇa, the less visible his brilliance, for he is covered by these qualities.

SB 7.1.9, Purport:

By external features one cannot understand who is favored by Kṛṣṇa and who is not. According to one's attitude, Kṛṣṇa becomes one's direct adviser, or Kṛṣṇa becomes unknown. This is not Kṛṣṇa's partiality; it is His response to one's ability to understand Him. According to one's receptiveness—whether one be a devatā, asura, Yakṣa or Rākṣasa—Kṛṣṇa's quality is proportionately exhibited. This proportionate exhibition of Kṛṣṇa's power is misunderstood by less intelligent men to be Kṛṣṇa's partiality, but actually it is no such thing. Kṛṣṇa is equal to everyone, and according to one's ability to receive the favor of Kṛṣṇa, one advances in Kṛṣṇa consciousness. Śrīla Viśvanātha Cakravartī Ṭhākura gives a practical example in this connection. In the sky there are many luminaries. At night, even in darkness, the moon is extremely brilliant and can be directly perceived. The sun is also extremely brilliant. When covered by clouds, however, these luminaries are not distinctly visible. Similarly, the more one advances in sattva-guṇa, the more his brilliance is exhibited by devotional service, but the more one is covered by rajo-guṇa and tamo-guṇa, the less visible his brilliance, for he is covered by these qualities. The visibility of one's qualities does not depend on the partiality of the Supreme Personality of Godhead; it is due to various coverings in different proportions. Thus one can understand how far he has advanced in terms of sattva-guṇa and how much he is covered by rajo-guṇa and tamo-guṇa.