The actual purpose and essence of the Prayer is supplication and supplication is a phenomenon that accords with the law of nature established by God Almighty. You may commonly observe that when a child weeps and cries, and expresses anxiousness, a mother becomes extremely restless as well and gives the child milk. The relationship between divinity (uluhiyyat) and servitude (ubudiyyat) is similar in nature and cannot be understood by everyone. When a person falls at the gate of God Almighty with extreme humility, lowliness and meekness, and presents his circumstances before God, and requests his needs from Him, the grace that is inherent in divinity surges forth and shows mercy to such a person.
(Malfuzat [English], Vol. 2, p. 67)