People can know the names of prayer, fasting, pilgrimage, and other devotions while becoming lax, divided, or attached to unauthorized additions. In such circumstances, reform does not require abandoning worship itself; it requires restoring its place, regularity, and proper performance.
One failure is neglect despite recognition of the duty. Another is the elevation of local custom into religion. A third is uncertainty about the correct limits and performance of a practice. Qur’anic legislation addresses such failings by giving the religious act an accountable and ordered form.