Since we are redeemed by grace alone, through Christ alone, must we still do good works and obey God’s Word?
Yes, because Christ, having redeemed us by his blood, also renews us by his Spirit; so that our lives may show love and gratitude to God; so that we may be assured of our faith by the fruits; and so that by our godly behavior others may be won to Christ.
(New City Catechism)
Infinite grace demands change:
new life must be shown in the living.
Where the Spirit breathes out, the fruit must be seen;
infinite grace demands change.
New life must call others to live:
when the dead come alive, the living are changed.
Faith rearranges the atoms of souls;
new life must call others to live.
And Christ shall be seen in the changing:
slow, imperceptible, sometimes a strain,
yet certain as sunrise, steady as day.
Christ shall be seen in the changing.
The Consolations of Writing 