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“Audacious prayer, which perseveres unflinchingly and ceases not through fear, is well pleasing unto God…[prayer is] the hardest work of all – a labour above all labours, since he who prays must wage almighty warfare against the doubt and murmuring excited by the faint-heartedness and unworthiness we feel within us…that unutterable and powerful groaning with which the godly rouse themselves against despair, the struggle in which they call mightily upon their faith.”
Martin Luther. Luther taught that prayer should be living, powerful, strong, mighty, earnest, serious, troubled, passionate, vehement, fervent and ardent. Overwhelmed yet?