Magnitudes of Prema

There are unlimited varieties of prema, but there is a vast difference in their magnitude. According to Viśvanātha Cakravartī's commentary on the varieties of heroine in "The Blazing Sapphire" (Ujjvala-nīlamaṇi), the four degrees of magnitude are: 
atomic, comparatively substantial, great and exceedingly great. 

1. In those persons whose devotional taste has not yet developed (ajāta-ruci), prema is present only in atomic quantity; it is only barely detectable and consequently, the Lord's giving of himself to such devotees is also just barely perceptible. 

2. At the opposite extreme, prema is found to be of exceedingly great magnitude only in the person of the Queen of Vrindavan, Śrīmatī Rādhārāṇī. There, because prema is present in its fullest possible manifestation, Kṛṣṇa is also in complete subordination to her. 

3. Sacred love (prema) is great in all the residents of Vrindavan and therefore Kṛṣṇa accepts the role of a subordinate to them also. 

4. The Lord submits himself to devotees like Nārada, in whom sacred love is greater or lesser, in proportion to their devotion. 

When the Lord consents to become a subordinate to his devotee, i.e., in a case where love is either great or exceedingly great, his majestic aspects remain completely hidden in the presence of so much devotional sweetness, in the way that the potencies of a feudal baron, though relatively apparent to his subordinates, remain subdued in the presence of the emperor.

The strength and magnitude of Rādhā's love is further eulogized in "The Jewel Box of Sacred Love" (Prema-sampuṭikā):

loka-dvayāt svajanataḥ parataḥ svato vā
prāṇa-priyād api sumeru-samā yadi syuḥ
kleśās tad apy atibalī sahasā vijitya
premaiva tān harir ibhān iva puñṭim eti 

As a strong lion defeats many elephants and then becomes further nourished
and strengthened by feeding on them,so too does sacred love, when exceedingly great, conquer all obstacles before it, whether they come from this world or the next,
from enemies or from family members, from one's own body or the things connected to it,
or even from that dearest one who is the object of the love itself.

Even if such obstacles should be as vast as the immeasurable Mount Meru,
sacred love will conquer them and, having conquered, become stronger and more vital. (Prema-sampuṭikā, 54.) 

From the commentary by Viśvanātha Cakravartī on Rūpa's Ujjvala-nīlamaṇi, 5.7. (ed.) Pandit Durgaprasad and Vasudeva Laksmana Shastri Pansikar, reprinted (Delhi: Chaukhamba Sanskrit Pratishthan, 1985), 105ā