Every Sunday millions of Christians pray, “Forgive us our sins, for we also forgive everyone who sins against us” (Luke 11:4). It’s easy to say that without thinking about whether we have really forgiven all those who have offended or wronged us.   Forgiveness is extremely difficult to grant others because it costs us so much. When we forgive someone, we accept the loss or the hurt without demanding any reimbursement, revenge, or satisfaction of any kind. Forgiveness means we suffer so that the offending party can be restored to fellowship with us.   To forgive means we hold no grudges and nurse no resentments. To forgive means to yield…