How is tranquility achieved in prayer?

Question:
May Allah reward you, Your Eminence, father. The questioner says: I hope you will clarify for me how I can achieve tranquility in my prayer?

Answer:
Achieve it through khushu' (humility) by remembering the greatness of Allah, before Whom you are standing. When you remember and keep in mind the greatness of the One before Whom you stand, your heart becomes humble, your limbs become still, and you find comfort in your prayer, taking pleasure in it, just as the Prophet (peace and blessings be upon him) took pleasure in prayer and found comfort in it. So when a matter of concern would befall him, he would say, "O Bilal, establish the prayer so that we may find rest in it. So that we may find rest in it." He would find rest in the prayer because he is addressing his Lord, standing before Him, and supplicating to Him. So it is a rest for the believer, a connection between the servant and his Lord. Yes.