The law of Jesus is the command to follow his example and the live by his action of presence and gift of self. In today's gospel Jesus says to pray. Therefore, to have your petitions granted, pray. Saint Bernardine suggests that one's prayers must be 'necessary for salvation' and that this was an understood aspect. But taking into account the weakness of man to know what is necessary for salvation, how can we atone for our ignorance?
Jesus would say, "pray."