If you wish to know the what is swarupa (real form) of a guru ,you must know your own swarupa (real form) first. How can one know the nature of a guru if one does not know one’s own real nature? If you want to know the real nature of the guru you must first learn to look upon the whole world as guru rupa( form). One must see guru in all living beings.—-Maharishi Ramana.
Comments; This is a very deep thing to understand . We think that we are a body and we think the guru is also a body. But no doubet that guru has a form like us, but he has realized to himself. and in his realization he comes to his real identification which is bliss (sat-chitt-ananda) which we can not see. so for this we have to work hard on meditation for our realization.
But before self-realization in the period of our Saddhna we should look upon the whole world as guru rupa (form). Every guru will suggest you to look upon everybody as guru or God . beacuse in the end when anybody finds Nirvana or liberation, he understands a unity in the whole world. That is why guru will suggest to you that look upon every being as a guru or God.