We have often heard the phrase "love of Godhead." How far this love of Godhead can actually be developed can be learned from the Vaiṣṇava philosophy. Theoretical knowledge of love of God can be found in many places and in many scriptures, but what that love of Godhead actually is and how it is developed can be found in the Vaiṣṇava literatures. It is the unique and highest development of love of God that is given by Caitanya Mahāprabhu.
Even in this material world we can have a little sense of love. How is this possible? It is due to the presence of our original love of God. Whatever we find within our experience within this conditioned life is situated in the Supreme Lord, who is the ultimate source of everything. In our original relationship with the Supreme Lord there is real love, and that love is reflected pervertedly through material conditions.
(Sri Caitanya Caritamrta---introduction).

Everyone depends upon dharma (religiosity), artha (economic development), kāma (sense gratification) and ultimately mokṣa (salvation), but Śrī Caitanya Mahāprabhu, due to His magnanimous character, can give more than salvation. Therefore in this verse the words hīnārthādhika-sādhakam indicate that although by material estimation salvation is of a quality superior to the inferior interests of religiosity, economic development and sense gratification, above salvation there is the position of devotional service and transcendental love for the Supreme Personality of Godhead. Śrī Caitanya Mahāprabhu is the bestower of this great benediction. Śrī Caitanya Mahāprabhu said, premā pum-artho mahān: "Love of Godhead is the ultimate benediction for all human beings." Śrīla Kṛṣṇadāsa Kavirāja Gosvāmī, the author of Śrī Caitanya-caritāmṛta, therefore first offers his respectful obeisances unto Lord Caitanya Mahāprabhu before describing His magnanimity in bestowing love of Godhead.
(Sri Caitanya Caritamrta---1:7:1---purport).

Śrī Caitanya Mahāprabhu is called mahā-vadānyāvatāra because although He is Śrī Kṛṣṇa Himself, He is even more favorably disposed to the poor fallen souls than Lord Śrī Kṛṣṇa. When Lord Śrī Kṛṣṇa Himself was personally present, He demanded that everyone surrender unto Him and promised that He would then give one all protection, but when Śrī Caitanya Mahāprabhu came to this earth with His associates, He simply distributed transcendental love of God without discrimination. Śrī Rūpa Gosvāmī, therefore, could understand that Lord Caitanya was none other than Śrī Kṛṣṇa Himself, for no one but the Supreme Personality of Godhead can distribute confidential love of the Supreme Person.
(Sri Caitanya Caritamrta---1:7:20-21---purport).

Although the members of the Pañca-tattva plundered the storehouse of love of Godhead and ate and distributed its contents, there was no scarcity, for this wonderful storehouse is so complete that as the love is distributed, the supply increases hundreds of times.
(Sri Caitanya Caritamrta---1:7:24---translation).