I feel myself to come, as it were, in a new garment before God.

Saint Paul says we are justified by faith in Christ, and not by the deeds of the law. For if righteousness came by the law, then Christ died in vain. . .

This esteem of faith does not disparage good works, for out of this faith springs all good works. Yet, we may not impute to the worthiness of faith or good works our justification before God; but ascribe and give the worthiness of it totally to the merits of Christ's passion; and declare and attribute the knowledge and perception of those merits to faith alone. 

. . . we may not impute to the worthiness of faith or good works our justification before God

The very true and only property of faith is to take, apprehend, and hold fast the promises of God's mercy, which makes us righteous; and causes me to continually hope for the same mercy; and, in love, to do the many good works ascribed in the Scripture, that I may be thankful for the same. 

The very true and only property of faith is to take, apprehend, and hold fast the promises of God's mercy. . .

Thus, I feel myself to come, as it were, in a new garment before God; and now, by His mercy, to be declared just and righteous: which before, without His mercy, was sinful and wicked. . .

~Katherine Parr, The Lamentation of a Sinner, 39-40, Kindle Edition