Prema is pure, blissful Consciousness without body, mind, senses intellect or ego. Its essence is beyond human comprehension.
The worship of the formless is very difficult; one needs to have a pure, awakened intellect and strong determination. Only those who do not have any trace of body consciousness can follow this path. As humans, we are born with name and form and so it is easier to engage the mind in worship of God with form. If one does penance with devotional fervor, he can merge in the formless, attribute less, Primal Soul.