The word brahma-tejasā, used in this verse, is significant. In those days, brāhmaṇas were so powerful that simply by desiring and by chanting a Vedic mantra, they could accomplish very wonderful effects. But in the present age of degradation there are no such brāhmaṇas. According to the pāñcarātrika system, in this age the entire population is supposed to consist of śūdras because the brahminical culture has been lost. But if anyone displays the signs of understanding Kṛṣṇa consciousness, he should be accepted, according to Vaiṣṇava smṛti regulations, as a prospective brāhmaṇa and should be given all facilities to achieve the highest perfection. The most magnanimous gift of Lord Caitanya's is that the highest perfection of life is available in this fallen age if one simply adopts the process of chanting Hare Kṛṣṇa, which is able to bring about the fulfillment of all activities in self-realization.
(Srimad Bhagavatam------4:4:34------purport).

However, Lord Caitanya's greatest gift was His teaching that Kṛṣṇa can be treated as one's lover. In this relationship the Lord becomes so much attached to His devotee that He expresses His inability to reciprocate. Kṛṣṇa was so obliged to the gopīs, the cowherd girls of Vṛndāvana, that He felt unable to return their love. "I cannot repay your love," He told them. "I have no more assets to give." Devotional service on this highest, most excellent platform of lover and beloved, which had never been given by any previous incarnation or ācārya, was given by Caitanya Mahāprabhu. Therefore Kṛṣṇadāsa Kavirāja, quoting Śrīla Rūpa Gosvāmī, writes in the fourth verse of his book, "Lord Caitanya is Kṛṣṇa in a yellow complexion, and He is Śacīnandana, the son of mother Śacī. He is the most charitable personality because He came to deliver kṛṣṇa-prema, unalloyed love for Kṛṣṇa, to everyone. May you always keep Him in your hearts. It will be easy to understand Kṛṣṇa through Him."
(Sri Caitanya Caritamrta------introduction).

The fruit of love of God is so delicious that wherever a devotee distributes it, those who relish the fruit, anywhere in the world, immediately become intoxicated.
Here the wonderful fruit of love of Godhead distributed by Lord Caitanya Mahāprabhu is described. We have practical experience that anyone who accepts this fruit and sincerely tastes it immediately becomes mad after it and gives up all his bad habits, being intoxicated by Caitanya Mahāprabhu's gift, the Hare Kṛṣṇa mahā-mantra. The statements of Śrī Caitanya-caritāmṛta are so practical that anyone can test them. As far as we are concerned, we are most confident of the success of the distribution of the great fruit of love of Godhead through the medium of chanting the mahā-mantra—Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare.
(Sri Caitanya Caritamrta------1:9:48------translation and purport).

In his book Caitanya-candrāmṛta, Śrīla Prabodhānanda Sarasvatī says, “One who receives a little favor from the Lord becomes so exalted that he does not care even for liberation, which is sought after by many great scholars and philosophers. Similarly, a devotee of Lord Caitanya considers residence in the heavenly planets a will-o’-the-wisp. He surpasses the perfection of mystic yoga power because for him the senses are like snakes with broken fangs.” A snake is a very fearful and dangerous animal because of his poison fangs, but if these fangs are broken, the appearance of a snake is no cause for fear. The yoga principles are meant to control the senses, but there is no scope for the senses of one engaged in the service of the Lord to be dangerous like snakes. These are the gifts of Śrī Caitanya Mahāprabhu.
(Sri Caitanya Caritamrta------1:14:1------ purport).

There are different types of devotees—those in śānta-rasa, dāsya-rasa, sakhya-rasa, vātsalya-rasa and mādhurya-rasa. Although all the rasas are on the transcendental platform, mādhurya-rasa is the supreme transcendental mellow. Consequently it is concluded that the worship of devotees engaged in the Lord's service in mādhurya-rasa is the supreme spiritual activity. Śrī Caitanya Mahāprabhu and His followers mainly worship Lord Kṛṣṇa in mādhurya-rasa. Other Vaiṣṇava ācāryas recommended worship up to vātsalya-rasa. Therefore Śrīla Rūpa Gosvāmī in his Vidagdha-mādhava (1.2) describes Śrī Caitanya Mahāprabhu's cult as supreme:
anarpita-carīṁ cirāt karuṇayāvatīrṇaḥ kalau
samarpayitum unnatojjvala-rasāṁ sva-bhakti-śriyam
Śrī Caitanya Mahāprabhu appeared in this Age of Kali to exhibit the superexcellence of mādhurya-rasa, a gift never previously bestowed by any ācārya or incarnation. Consequently Śrī Caitanya Mahāprabhu is accepted as the most magnanimous incarnation. It is He only who distributed love of Kṛṣṇa while exhibiting the superexcellence of loving Kṛṣṇa in the conjugal rasa.
(Sri Caitanya Caritamrta------2:11:31------ purport).

The Kṛṣṇa consciousness movement is the unique gift of Lord Caitanya to the fallen souls of this age. It is a very simple method which has actually been carried out during the last four years in the Western countries, and there is no doubt that this movement can satisfy the dormant loving propensities of humanity. This book, Kṛṣṇa, is another presentation to help the Kṛṣṇa consciousness movement in the Western world. This transcendental work of literature is published with profuse illustrations. People love to read various kinds of fiction to spend their time and energy. Now this tendency can be directed to Kṛṣṇa. The result will be the imperishable satisfaction of the soul, both individually and collectively.
It is said in the Bhagavad-gītā that even a little effort expended on the path of Kṛṣṇa consciousness can save one from the greatest danger. Hundreds of thousands of examples can be cited of people who have escaped the greatest dangers of life due to a slight advancement in Kṛṣṇa consciousness. We therefore request everyone to take advantage of this great transcendental literary work. One will find that by reading one page after another, an immense treasure of knowledge in art, science, literature, philosophy and religion will be revealed, and ultimately, by reading this one book, Kṛṣṇa, love of Godhead will fructify.
(Krsna Book).