One who is able to withdraw his senses from sense objects, as the tortoise draws his limbs within the shell, is to be understood as truly situated in knowledge.
It is the Path of the Good Mind which Thou hast manifested to me, O Ahura! Whereby the welldoers, in accordance with the teaching of the Spiritual Guides, acting in harmony with Truth alone, Shall pass onward to the assigned reward of which Thou art the bestower, O Mazda! This precious reward of Thine, O Mazda, Thou givest by way of the Good Mind, Thou givest to those who perform actions through knowledge and pure thought; who attempt for the progress and development of the world; fulfil God’s desire and try for the progress of God’s Will through truth and righteousness.
The soul that is attached to anything, however much good there may be in it, will not arrive at the liberty of Divine union. For whether it be a strong wire rope or a slender and delicate thread that holds the bird, it matters not, if it really holds it fast; for until the cord be broken, the bird cannot fly.

