The essence of Islamic Spirituality

What is true 'Islamic Spirituality'?  It could be described and understood in a few ways: To surrender oneself fully to the will of Allah.  To embrace Allah's constant, eternal Presence.  To use the outward rituals of Islam as catalysts to deepen our awareness of Allah's Presence.  To exchange one's own mind-made fantasies for the beauty of Allah's Reality.  Put most simply, it is 'Zikr Allah' - to bring Allah to mind. To clean one's heart, by quietening one's mind; removing thoughts of anything, thereby finding the One Source of everything.