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Cf. above, xxxi. 12. There was begun the argument about showing gratitude to Allah, introducing Luqman's teaching and philosophy. Such gratitude is shown by our understanding His love and doing our duty to Him by serving our fellow-men. For Allah Himself is Free from all wants and is in no way dependent on our service. That argument has been illustrated in various ways. But now we are told that it can never be completed, for no human tongue or human resources can be adequate either to praise him or to expound His Word.