Rūḥ means “spirit, soul.” It is related to rīḥ, which means “wind.” Rāḥah, which means “comfort, contentment, or ease,” also comes from the same root, as does the word rā’iḥah, which means “perfume” and mirwaḥah, which means “fan.” The implication here is that the spirit is like a wind; it is as subtle as a summer breeze. The spirit is blown into the body and later blown out of it. Like the wind, its subtlety is balanced by its forcefulness. It says in the Qur’an, “They ask you about the soul. Say: the soul is one of the commands of my Lord” (17:85).
On that Night of Power the All-Mighty, All-Powerful Lord extends His mercy of knowledge and opens up the skies, and the angelic powers and forces fulfill their merciful duty of bringing forth clearly the message and knowledge of tawḥīd and the command and control of the Lord.
From ‘Beams of Illumination from the Divine Revelation’
By Shaykh Fadhlalla Haeri