Know that God Almighty commanded His servants to believe in Him and in what was revealed to them at the hands of His Messengers, and He made with faith an obligation of meanings. God Almighty commanded them to carry all of them inwardly as a moral burden, and made their place in the hearts. He specified practical matters that He sent down to their outward appearance and carried into their limbs, which entails a tangible cost of work. Hands and feet, and things that only work with the body, such as prayer and jihad, and things that have no physical cost, such as lowering one’s gaze from forbidden things and looking at verses so that looking at them leads to consideration, setting one’s hearing aside from hearing backbiting, and listening to beautiful hadith. Such things have no physical cost, but rather a psychological cost, for it involves abandoning the purpose . /p>