"Allah has assigned a designated act of servitude and a required act of obedience in every limb of a servant's body; it is created and prepared for this purpose."
"Therefore, Allah the Exalted has called the monotheists to these five prayers out of His mercy for them, preparing within them the various types of worship so that the servant may receive his abundant share of all words, actions, movements, and stillness from His gifts."
"The one praying is as if he is not in this world or involved in any of its matters. When he is with all his heart and all his body in the prayer, it is as if he is not on earth — except that the weight of his body is upon it."
"How is it permissible for a sensible believer to be weary of it, to turn away, or to be preoccupied with other than facing the Lord of the Worlds — when the Prophet informed him that Allah is facing him? Would anyone do that except out of lack of concern for the One facing him? How is it permissible for one who knows that Allah is facing him and is communing with Him to turn away from Him, whether a little or a lot?"