Harikeśa: "The devotee should first concentrate his mind on the Lord's lotus feet, which are adorned with the marks of a thunderbolt, a goad, a banner and a lotus. The splendor of their beautiful ruby nails resembles the orb of the moon and dispels the thick gloom of one's heart." (SB 3.28.21)
Prabhupāda: Sañcintayed bhagavataś caraṇāravindam. This is the beginning of meditation, sañcintayet. It is not nirviśeṣa, nirakara meditation. What is that meditation? Here it is, direction, sañcintayet. Sañcintayet means meditation. What about, meditation? Sañcintayed bhagavataś caraṇāravindam. First of all meditate on the lotus feet, caraṇāravindam, lotus feet of Kṛṣṇa. And if you minutely see, then you will find the symptoms are there. Our feet and Kṛṣṇa's feet, there is difference. Why difference? Because on the sole these marks are there. What is that? Vajra aṅkuśa, dhvaja, saroruha. Four things are there: thunderbolt, mark of thunderbolt; and kuśa, the mark of... What is that instrument which controls the elephant?
Harikeśa: Driving rod?
Prabhupāda: No. It is called aṅkuśa in Sanskrit. It is like this.
Harikeśa: Hook.
Prabhupāda: Maybe, whatever. So aṅkuśa; vajra, thunderbolt; then aṅkuśa; then dhvaja, flag; and saroruha, lotus—these four things are there. You have seen. Sometimes Viṣṇu lotus feet is painted and these signs are there. So sañcintayet. What about, sañcintayet? These things, minutely, that "Here is the lotus feet of Kṛṣṇa, and on the sole, upon the sole, these marks are painted." Lāñchanāḍhyam, deriving. It is very brilliant, beautiful. Kṛṣṇa's everything is beautiful. Uttuṅga-rakta-vilasan-nakha-cakravāla. This is the special significance of Kṛṣṇa's hand, that these nails are raised and reddish, uttuṅga-rakta-vilasan-nakha-cakravāla. It is just like cakravāla bird. Jyotsnābhiḥ. And from the effulgence of the nails, jyotsnābhiḥ, āhata, if you see the brilliance and effulgence of the nails of Kṛṣṇa, nails in the finger of Kṛṣṇa, then the result will be that āhata-mahad-dhṛdayāndhakāram.