If you wish to pray as you ought, do not cause grief to any soul. Otherwise you are running in vain.
He says, “Leave your gift before the altar, go, and first be reconciled to your brother.” Then when you come back you will pray without disturbance. For during prayer a grudge will mar the ruling faculty of the mind and cast a shadow over your prayers.
Those who sweep up grudges and grief for themselves while thinking that they are praying are like those who draw water into a jar with holes.