"One cannot understand the transcendental nature of the name, form, qualities and pastimes of Sri Krsna through his materialy contaminated senses. Only when one becomes spiritually saturated by transcendental service to the Lord, are the transcendental form, name, quality and pastimes of the Lord revealed to him." (Padma Purana)
So how is it possible to understand Krsna and see His beautiful form?
The answer is, if we train our senses, if we purify the senses, those purified senses will help us see God. It is just as if we had cataract on our eyes. Because we are suffering from cataracts, we cannot see. But this does not mean there is nothing to be see--only that we cannot see. Similarly, now we cannot conceive the form of God, but if our cataracts are removed, we can see Him.
The devotees whose eyes are anointed with the 'love-of-God' ointment see God, Krsna, within their hearts twenty four hours a day. So we require to purify our senses and then we will be able to understand what the form of God is, what the name of God is, what are His qualities, what the abode of God is and what the paraphernalia of God are.