With the spread of the Kṛṣṇa consciousness movement, everyone will merge in an ocean of love of Kṛṣṇa.
(Sri Caitanya Caritamrta---1:13:32---purport).

The devotee, by development of pure love for Kṛṣṇa, constantly sees the Supreme Personality of Godhead, who is known as Śyāmasundara, within his heart.
(Srimad Bhagavatam---4:21:42---purport).

The regulative principles help ordinary devotees rise to the stage of perfect love of Godhead. Pure love for Kṛṣṇa is the perfection of pure devotion, and pure devotional service is identical with spontaneous devotional service.

(Sri Caitanya Caritamrta---1:4:21-22---purport).

It is essential that one constantly associate with pure devotees who are engaged morning and evening in chanting the Hare Kṛṣṇa mantra. In this way one will get the chance to purify his heart and develop this ecstatic pure love for Kṛṣṇa.
(Nectar of Devotion).

One who has developed real love for Kṛṣṇa, he cannot do without thinking of Kṛṣṇa, without talking of Kṛṣṇa, without acting for Kṛṣṇa.
(Morning walk--3rd. April, 1974--Bombay).

If love for Kṛṣṇa in a seedling state has fructified in one’s heart, one is not agitated by material things.
(Sri Caitanya Caritamrta---2:23:20---translation).

After taste is awakened, a deep attachment arises, and from that attachment the seed of love for Kṛṣṇa grows in the heart.
(Sri Caitanya Caritamrta---2:23:12---translation).

When one is sufficiently trained and acts in submissive faith and love for Kṛṣṇa under the direction of the bona fide spiritual master, the dovetailing process becomes more firm and accurate.
(Srimad Bhagavatam--3:15:45---purport).

When devotional service is executed on the transcendental platform of pure goodness, it is like a sun-ray of love for Kṛṣṇa.
(Sri Caitanya Caritamrta---2:23:5---translation).

To regard Kṛṣṇa as one's superior is called reverential feeling, and when, in addition to this, a devotee feels that Kṛṣṇa is his protector, his transcendental love for Kṛṣṇa is increased, and his combined feelings are called reverential devotion.
(Nectar of Devotion).

By this process, one can attain the highest perfection of love of Godhead, which is the most desirable treasure.
(Sri Caitanya Caritamrta----2:22:104---purport).

The sum total of devotional qualities is development of unalloyed love for Kṛṣṇa. This unalloyed love for Kṛṣṇa can be achieved simply by hearing about Kṛṣṇa.
(Srimad Bhagavatam---4:12:42---purport).

To develop unalloyed love for Kṛṣṇa is the perfection of life.
(Srimad Bhagavatam---7:7:51-52---purport).

Unalloyed devotional love for Kṛṣṇa is the only cause for the Lord’s satisfaction.
(Sri Caitanya Caritamrta---1:17:75---translation).

Simply by chanting the holy name of Lord Kṛṣṇa, one can be freed from all undesirable habits. This is the means of awakening all good fortune and initiating the flow of waves of love for Kṛṣṇa.
(Sri Caitanya Caritamrta---3:20:11---translation).