So it is impossible to deny God’s existence, merely because we are unable to see him, due to the darkness of ignorance which covers our eyes.

Greatness of Sankaracharyas ( Sringeri)

Do we deny the existence of a place or person just because we have not seen it or him with our own eyes? Do we not rely on the accounts of others who have seen? So it is impossible to deny God’s existence, merely because we are unable to see him, due to the darkness of ignorance which covers our eyes.
One has to rely upon the experiences of the many god-realized sages who have graced our land. .- Sri Sri Bharati Tirtha Mahaswamigal