Characteristics required in prayer…

Seven characteristics are required in prayers. Prayer should be faithful, in accordance with the scripture: “Whatever you pray for, believe that you already have it, and it will be yours.” (Mark 11:24) then prayer should be pure, after the example of Abraham, who drove the birds away from his sacrifice. (Genesis 15:11) Third, it should be just. Fourth, it should be heartfelt, since “the heartfelt prayer of a just person works very powerfully.” (James 5:16) fifth, it should be humble. Sixth, it should be fervent (these last two characteristics you see in the mustard seed.) And seventh, it should be devout.
— Saint Bernard of Clairvaux  (1090-1153)