The nature of god
An impoverished person thinks that God is an old man with white hair, sitting on a wonderous throne of fire that glitters with countless sparks, as the Bible states: "The Ancient-of-Days sits, the hair on his head like clean fleece, his throne-flames of fire." Imagining this and similar fantasies, the fool corporealizes God. He falls into one of the traps that destroy faith. His awe of God is limited by his imagination.
But if you are enlightened, you know God's oneness; you know that the divine is devoid of bodily categories- these can never be applied to God. Then you wonder, astonished: Who am I? I am a mustard seed in the middle of the sphere of the moon, which itself is a mustard seed within the next sphere. So it is with that sphere and all it contains in relation to the next sphere. So it is with all spheres- one inside the other-and all of them are a mustard seed within the further expanses. And all of these are a mustard seed within further expanses.
Your awe is invigorated, the love of your soul expands.
-Moses Cordevero (16th century)
The Essential Kabbalah, Daniel Matt