A dog cannot tell a guest from a thief or a beggar; when it catches sight of either, it barks wildly at him. It is no use teaching the creature, your words are wasted. Milk makes him sick, but he eats filth; he will not give up his own habits. Tuka says, What use is it to praise or blame a scoundrel for conduct which issues from his own thoughts?
Hinduism
Tukaram, Poem 1103
Source The Poems of Tukârâma, trad. J. Nelson Fraser et K. B. Marathe, 3 vol., 1909-1915, archive.org · Contents