Human nature in its fourfold state ... In several practical discourses

4 It is an universal change; all things become new, 2 Cor. vi. 17. It is a blest leaven that leavens the whole lump, the whole spirit, and soul and body. Original sin infects the whole man; and regenerating grace, which is the salve, goes as far as the sore. This fruit of the Spirit is in all goodness; goodness of the mind, goodness of the will, goodness of the affections, goodness of the whole man One gets not only a new head to know religion, or a new tongue to talk of it; but a new heart to love and embrace it, in the whole of his conversation. When the Lord opens the sluice of grace on the soul's new birthday, the waters run through the whole man, to purify and make him fruitful. In these natural changes spoken of before, there are, as it were, pieces of new cloth put into an old garment; a new life sewed to an old heart: but the gracious change is a thorough change, a change both of heart and life.

5. Yet it is but an imperfect change. Tho' every part of the man is renewed, there is no part of him perfectly renewed. As an infant has all the parts of a man, but none of them are come to their perfect growth; so regeneration brings a perfection of parts, to be brought forward in the gradual advances of sanctification, 1 Pet ii. 2. As new born babes desire the sincere milk of the word, that ye may grow thereby. Although in regeneration there is a heavenly light let into the mind; yet there is still some darkness there: tho' the will is renewed, it is not perfectly renewed; there is still some of the old inclination to sin remaining: and thus it will be till that which is in part be done away, and the light of glory come Adam was created at his full stature; but they that are born, must have their time to grow up; so these that are born again, do come forth into the new world of grace, but imperfectly holy; though Adam, being created upright, was at the same time perfectly righteous, without the least mixture of sinful imperfection