Perfect knowledge can be understood by the unalloyed devotees of the Lord directly. Others are unable to understand. BG 1972 purports

Expressions researched:
"Perfect knowledge can be understood by the unalloyed devotees of the Lord directly. Others are unable to understand"

Bhagavad-gita As it is

BG Chapters 13 - 18

The Lord has described in summary the body, knowledge and the knowable. This knowledge is of three things: the knower, the knowable and the process of knowing. Combined, these are called vijñānam, or the science of knowledge. Perfect knowledge can be understood by the unalloyed devotees of the Lord directly. Others are unable to understand.

BG 13.19 (1972), Translation and Purport

Thus the field of activities [the body], knowledge, and the knowable have been summarily described by Me. Only My devotees can understand this thoroughly and thus attain to My nature.

The Lord has described in summary the body, knowledge and the knowable. This knowledge is of three things: the knower, the knowable and the process of knowing. Combined, these are called vijñānam, or the science of knowledge. Perfect knowledge can be understood by the unalloyed devotees of the Lord directly. Others are unable to understand. The monists say that at the ultimate stage these three items become one, but the devotees do not accept this. Knowledge and development of knowledge mean understanding oneself in Kṛṣṇa consciousness. We are being led by material consciousness, but as soon as we transfer all consciousness to Kṛṣṇa's activities and realize that Kṛṣṇa is everything, then we attain real knowledge. In other words, knowledge is nothing but the preliminary stage of understanding devotional service perfectly.