CC Madhya 10.119
śāmyac-chāstra-vivādayā rasa-dayā cittārpitonmādayā
śaśvad-bhakti-vinodayā sa-madayā mādhurya-maryādayā
śrī-caitanya dayā-nidhe tava dayā bhūyād amandodayā
This important verse (Śrī Caitanya-candrodaya-nāṭaka 8.10) specifically describes the Lord’s causeless mercy. Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura explains that Śrī Caitanya Mahāprabhu, who is the most magnanimous Personality of Godhead, distributes His causeless mercy in three ways to the conditioned soul. Every living entity is morose in the material world because he is always in want. He undergoes a great struggle for existence and tries to minimize his miserable condition by squeezing the utmost pleasure out of this world. But the living entity is never successful in this endeavor. While in a miserable condition, a person sometimes seeks the favor of the Supreme Personality of Godhead, but this is very difficult for materialistic people to obtain. However, when one becomes Kṛṣṇa conscious by the grace of the Lord, the fragrance of the lotus feet of the Lord expands, and in this way a materialist may gain freedom from his miseries. Actually his mind is cleansed by his transcendental connection with the lotus feet of the Lord. At such a time one is enlightened by the loving service of the Lord.
There are many different kinds of scriptures, and by reading them one often becomes puzzled. But when one receives the mercy of the Lord, his confusion is mitigated. Not only are scriptural disparities resolved, but a kind of transcendental bliss is awakened, and in this way one is fully satisfied. The transcendental loving service of the Lord constantly engages the conditioned soul in serving the Lord’s lotus feet. Through such fortunate engagement, one’s transcendental love for Kṛṣṇa is increased. One’s position is thus completely purified, and one is filled with transcendental bliss accompanied by the spirit soul’s jubilation.
Thus the transcendental causeless mercy of Lord Kṛṣṇa is manifested in the heart of the devotee. At such a time, material needs no longer exist. The lamentation that invariably accompanies material desires also vanishes. By the grace of the Lord one is elevated to the transcendental position, and then the transcendental mellows of the spiritual world are manifested in him. One’s devotional service then becomes firm, and one engages in the Lord’s transcendental loving service with great determination. All these combine to fully awaken the devotee’s heart with love of Kṛṣṇa.
In the beginning, a conditioned soul is bereft of Kṛṣṇa consciousness and is always morose in his material activities. Later, by associating with a pure devotee, one becomes inquisitive to know the Absolute Truth. In this way one begins to engage in the transcendental service of the Lord. Next, by the Lord’s grace all misconceptions are vanquished and the heart is cleansed of all material dirt. It is only then that the pleasure of transcendental bliss is awakened. By the Lord’s mercy one is completely convinced of the value of devotional service. When one can see the pastimes of the Lord everywhere, he is firmly situated in transcendental bliss. Such a devotee is relieved of all kinds of material desires, and he preaches the glories of the Lord all over the world. These Kṛṣṇa conscious activities separate him from material activities and the desire for liberation, because at every step the devotee feels himself connected with the Supreme Personality of Godhead. Although such a devotee may sometimes be involved in household life, he is untouched by material existence due to his constant engagement in devotional service. Thus everyone is advised to take shelter of devotional service to become happy and liberated.