The atma-medhah is always thinking of Krsna's activities in Krsna consciousness. Since Sanat-kumara, who was a son of Lord Brahma, was fully Krsna conscious, he could point out the path of spiritual advancement

Expressions researched:
"The ātma-medhāḥ is always thinking of Kṛṣṇa's activities in Kṛṣṇa consciousness. Since Sanat-kumāra, who was a son of Lord Brahmā, was fully Kṛṣṇa conscious, he could point out the path of spiritual advancement"

Srimad-Bhagavatam

SB Canto 4

Lord Kṛṣṇa is Paramātmā. Īśvaraḥ paramaḥ kṛṣṇaḥ (BS 5.1). Therefore one whose mind is acting fully in Kṛṣṇa consciousness is called ātma-medhāḥ. This may be contrasted to the word gṛha-medhī, which refers to one whose brain is always engrossed with thoughts of material activities. The ātma-medhāḥ is always thinking of Kṛṣṇa's activities in Kṛṣṇa consciousness. Since Sanat-kumāra, who was a son of Lord Brahmā, was fully Kṛṣṇa conscious, he could point out the path of spiritual advancement.

SB 4.22.41, Translation and Purport

The great sage Maitreya continued: Being thus enlightened in complete spiritual knowledge by the son of Brahmā—one of the Kumāras, who was complete in spiritual knowledge—the King worshiped them in the following words.

In this verse the word ātma-medhasā is commented upon by Śrīpāda Viśvanātha Cakravartī Ṭhākura, who says that ātmani means "unto Lord Kṛṣṇa, paramātmani." Lord Kṛṣṇa is Paramātmā. Īśvaraḥ paramaḥ kṛṣṇaḥ (BS 5.1). Therefore one whose mind is acting fully in Kṛṣṇa consciousness is called ātma-medhāḥ. This may be contrasted to the word gṛha-medhī, which refers to one whose brain is always engrossed with thoughts of material activities. The ātma-medhāḥ is always thinking of Kṛṣṇa's activities in Kṛṣṇa consciousness. Since Sanat-kumāra, who was a son of Lord Brahmā, was fully Kṛṣṇa conscious, he could point out the path of spiritual advancement. The word ātma-gatiḥ refers to that path of activities by which one can make progress in understanding Kṛṣṇa.