words , phrases , references - at best vaguely known , at worst : arcane , esoteric , abstruse - causing each to rub his eyes , massage temples , wring fingers - mental gasping , spiritual bewilderment : only trusting in the self-confidence of deacon - the smoothness of his delivery , the almost serenity of his over-all poise , presence : because he knows , they know , so they know - ah !