Mercy has two aspects. It involves giving, helping and serving others, but it also includes forgiveness and understanding. Matthew sums it up in one golden rule: “In everything, do to others as you would have them do to you” (7:12). The Catechism reminds us that this law is to be applied “in every case”, especially when we are “confronted by situations that make moral judgments less assured and decision difficult”.
Giving and forgiving means reproducing in our lives some small measure of God’s perfection, which gives and forgives superabundantly. For this reason, in the Gospel of Luke we do not hear the words, “Be perfect” (Mt 5:48), but rather, “Be merciful, even as your Father is merciful. Judge not, and you will not be judged; condemn not, and you will not be condemned; forgive, and you will be forgiven; give, and it will be given to you” (6:36-38). Luke then adds something not to be overlooked: “The measure you give will be the measure you get back” (6:38). The yardstick we use for understanding and forgiving others will measure the forgiveness we receive. The yardstick we use for giving will measure what we receive. We should never forget this.
Jesus does not say, “Blessed are those who plot revenge”. He calls “blessed” those who forgive and do so “seventy times seven” (Mt 18:22). We need to think of ourselves as an army of the forgiven. All of us have been looked upon with divine compassion. If we approach the Lord with sincerity and listen carefully, there may well be times when we hear his reproach: “Should not you have had mercy on your fellow servant, as I had mercy on you?” (Mt 18:33).
Seeing and acting with mercy: that is holiness.