'Most of the sin that we do not commit are not because of our virtue, but because we lack either energy or opportunity. We would sin a great deal more than we do if we were only energetic enough and were provided with more generous opportunities. It is well to stay in touch with the sins that we would have committed if we had had the chance. The Psalms extend our memory to not only the sins that we have committed but to those we would have if we had not been so tired at the time.'
Eugene H Peterson, Answering God, p.114.