Moses Prayers Moved the Creator of the Universe at an Emotional Level

Moses prays to god, 'turn from your fierce anger. Relent and do not bring disaster on your people' In the hebrew naham can be translated as changed his mind or even as repented. The very next then, the lord relented and did not bring on his people the disaster he had threatened. Moses is calling god back to his own character. He's holding god to god's word.