Dhritarashtra can be thought of as a state of blindness; being morally blind, spiritually blind, and intellectually blind.
Arjuna can be another aspect in us, the seeking mind, the searching mind, and the mind that likes to be disciplined. It is the mind that likes to be related to the source of wisdom
And the third is
Krishna, the one light which is present in all of us; the eternal, self-luminous awareness of the Supreme, by whatever name you call it.
Guru Nitya Chaithanya Yati (1923 - 1999)