Our sincere desire counts far more than any specific success or failure. Thus when we try to pray and cannot, or when we fail in a sincere attempt to be compassionate, God touches us tenderly in return.
“that’s what purity of heart has to do with: there’s nothing that compromises the intent… you may not be all the way there with your mouth, your body, or your mind, but [God blesses] the man who says ‘Lord, my heart is after YOU!’” -Jack Hayford, Promise Keepers 1993