No renaissance of Islamic life can be effected purely by law or statute, or by the establishment of a social system on the basis of the Islamic philosophy. Such a step is only one of the two pillars on which Islam must always stand in its construction of life. The other is the production of a state of mind imbued with the Islamic theory of life, to act as an inner motivation for establishing this form of life and to give coherence to all the social, religious, and civil legislation. Social justice is an integral part of this Islamic life; it cannot be realized unless this form of life is first realized, and it cannot have any guaranteed permanence unless this form of life is built up on solid foundations. It is in this similar to all other social systems; it must have the support of public belief and confidence in its merits. Failing this, it will lose its spiritual foundations, and its establishment will depend on the force of religious and social legislation; this is a force that obtains only so long as evasion is impossible.
Hence Islamic legislation relies on obedience and conviction; it depends on religious belief. Thus we must always keep in mind the necessity for a renaissance of our religious faith; we must cleanse it of all accretions, such as alterations and arbitrary interpretations and ambiguities; only thus can it be a support for the necessary social legislation that will establish a sound form of Islamic life. This form of life will depend upon legislation and exhortation, those twin fundamental methods of Islam towards the achievement of all aims.
We must, then, establish our Islamic theory in individuals and societies at the same time that we set up the Islamic legislation to regulate life.
"Social Justice in Islam" - Sayyid Qutb, p. 285