Adam Clarke on Luke 18:2

A judge, which feared not God, neither regarded man - It is no wonder that our Lord calls this person an unrighteous judge, Luk 18:6. No person is worthy to be put in the sacred office of a judge who does not deeply fear God, and tenderly respect his fellow creatures. Because this person feared not God, he paid no attention to the calls of justice; and because he respected not man, he was unmoved at the complaint of the widow. Even among the heathens this was the character of a man totally abandoned to all evil. So Dion Cassius says of Vitellius, that he neither regarded gods nor men - ουτε των ανθρωπων, ουτε των θεων εφροντιζεν.