For the Christian what matters yesterday, today, and tomorrow is not what you’ve done, but what Jesus has done. The Gospel is for your good and bad days, because God in Jesus came to save you from your “goodness” and your sinfulness.
Do not define today on the events that happened today or even yesterday(s). Define today on the event of the death and resurrection of Jesus Christ 2,000 years ago.
The following quotes unleash the daily power of the Gospel:
New Testament scholar George Eldon Ladd:
“The ground of our acceptance [before God] is not our works nor our faith, nor is it the work of Christ within us; it is what he has done for us objectively.” (A Theology of the New Testament, 448)
Protestant Reformer Martin Luther:
“…by a wonderful exchange our sins are no longer ours but Christ’s, and the righteousness of Christ is not Christ’s but ours. He has emptied himself of his righteousness that he might clothe us with it, and fill us with it.” (Quoted in Anthony Hoekema’s Saved by Grace, 184)
Christian author Jerry Bridges:
“Your worst days are never so bad that you are beyond the reach of God’s grace. And your best days are never so good that you are beyond the need for God’s grace.” (The Discipline of Grace, 18)