"What point does the claim, 'I am the Creative Truth' imply? Do you think that this mystery was mere nonsense?"
The mystery of Creation is a Secret, never unveiled until this creation becomes familiar to Human Beings. A person who succeeded to know himself, can get the secret of this mystery.
Ahriman which is commonly called Iblees just refused to Bow the Adam because Adam was formed by mud and clay where as he was produced by fire, and so he felt this as an insult to bow such a specie he considered as inferior for him. He refused to accept the order of God and become the disobedient.
Human beings are made by mud and clay, but just think what is the worth of being so muddy and earthly.
When a seed is sown into the mud, may be it brings shame to it for a while but what, when this seed makes itself a tree, got nourishment from the mud which makes it capable of being twisted and turned, thus captures the bright rays of Sunlight.
Same with a Human being, made with clay but when got nourishment from his own earth, its own self and makes his heart so capable that it can capture the bright rays from the Nature, thus shows its worth. Why he was considered as superior compare to other species near to God.
Seed of Love and beauty inside one's self makes his heart so pure that God finally rewards the secret of the Creation to the person of muddy substance. He gives him the mystery of Creativity and so this muddy substance can perform miracles with the free hand of God, having Love and purity as his tools, and claims to be "Creative Truth".
I become you, and you become I
I become soul and you the body [Khusro]
People believe on God should believe themselves too.
"I kindled in myself the fire of life and spoke to the dead of the mysteries of life." [Republic of Rumi]