"The quintessential revolution is that of the spirit, born of an intellectual conviction of the need for change in those mental attitudes and values which shape the course of a nation's development. A revolution which aims merely at changing official policies and institutions with a view to an improvement in material conditions has little chance of genuine success. Without a revolution of the spirit, the forces which produced the iniquities of the old order would continue to be operative, posing a constant threat to the process of reform and regeneration."