Will of God in Hinduism is known as Ishwara Sankalpa. Upanishads states that the fire burns and the wind blows because of the will of Brahman. Chandogya Upanishad (III.14.4) states that the Supreme Being creates all, wills all, smells all, tastes all, pervades all, yet is silent and unaffected.
The Brahman in Hinduism is regarded as the cause antecedent in time and the universe is regarded as the effect proceeding from it.
Mundaka Upanishad (I.1.7) states that the entire universe proceeds from that imperishable one in the same way as a spider weaves its web or as plants shoot up from the earth.
The sun and the moon are held together and the sky and earth remain as they are, ordained by Brahman (Brihadaranyaka Upanishad – III.8.9).
This perception of Brahman, as the controller of all the forces of nature and of mankind and all the effects of the universe as the effects of his command, led to the theistic thought that holds Brahman as God and as controlling the world.
Moreover, Chandogya Upanishad (VI.2.3) states, in the well-known discourse to Svetaketu, that Brahman desired to become manifold created tejas (light), ap (water) and kshiti (earth). Then the self-existent Brahman entered into these three. All other bodies are formed by their combination.