Surdas, the blind singer, had Krishna Himself sitting in front of him as a cowherd boy, humming in appreciation; as his ardent listener whenever he sang. Surdas took him to be a cowherd boy from the villages around, though he sang that all beings are His forms.
Once Krishna revealed to him that He was the hero of his heart. He touched his eyes with His Divine fingers so that He could see(this was the only occasion when Surdas could see Krishna with his physical eyes). From his lips, he could hear the Self all along, whenever be started meditating on the Lord; as a matter of fact, he was only trying all along to put that music into verse.
He then declared that he did not care to see other things with the sight vouchsafed to him; he said that his inner eyes were enough. The purified inner vision gave him lasting joy and therefore, unfailing health.
Once Lord Krishna appeared before Surdas and told him, Surdas, if you are keen to see the world, I shall restore your sight to you this very moment. The great devotee that he was, Surdas replied, Those who are endowed with eyes are really blind when they do not gaze upon your auspicious, beautiful form. Having ears, they are nevertheless deaf, when they do not choose to listen to the music of your melodious song. Having in their hands the power to attain the Divine they drown themselves in the ocean of samsara(worldly life). Although you dwell in their hearts, they are carried away by the transient attractions of the world. Though they have large eyes, they are not able to see you. Hence, I have no need for such hearts, such eyes or ears. Give me the ears O Lord that will listen to your song, eyes that will see your beautiful form and a heart in which you are only installed.?
The difficulty in recognising the truth about the Divine was expressed by the Saint Surdas when he sang, Oh Krishna! How can I recognise You? You are subtler than the atom and vaster than the vastest. You are manifested in the eighty four lakhs of species in the universe, permeating everything in the cosmos, from a blade of grass to the vastest thing in the creation. How can I recognise Your infinite form? The great ones experienced God in this infinite form, recognising that the Divine was present even in the wicked and evil minded.