Rashn Yast
The holy (Zarathustra) asked him': 'O holy Ahura Mazda! I ask thee; answer me with words of truth, thou who knowest the truth. Thou art undeceivable, thou hast an undeceivable understanding; thou art undeceivable, as thou knowest everything. 'What of the Holy Word is created true? what is created progress-making? what is fit to discern? what is healthful? what is wise? what is happy and more powerful to destroy than all other creatures?'