Devin took away 'Stanley''s voice as what he sees as an act of mercy. He had seen 'Stanley' countless times torment himself in attempts to speak, even instinctive noises such as a huff, a grunt, or a scream lead him to glich himself into oblivion. So, he took his voice away by muting him.
He doesn't care that 'Stanley' would and may have hated him for this. He knows how painful to glitch is like, so he's taking that pain away from him whether he likes it or not.














