The divine life in three treatises

6. If Adams Nature had not been Disposed to God as to his End and Sovereign, then the Law of Nature (to adhere to God, and obey and serve him) was not written in his heart: And then it would not have been his duty to adhere to God, and to obey and serve him; which is so false, that even in lapsed unrenewed Nature, there is left so much aptitude hereto, as will prove him to be still under the obligations of this Law of Nature, even actually to adhere to God, and to obey him, which a dead man, a mad man, or an Infant is not (immediately.)

6. If Adams Nature had not been Disposed to God as to his End and Soveraign, then the Law of Nature (to adhere to God, and obey and serve him) was not written in his heart: And then it would not have been his duty to adhere to God, and to obey and serve him; which is so false, that even in lapsed unrenewed Nature, there is left so much aptitude hereto, as will prove him to be still under the obligations of this Law of Nature, even actually to adhere to God, and to obey him, which a dead man, a mad man, or an Infant is not (immediately.)

By all this you see, that though the blindness and disease of Reason, is contrary to faith and holiness, yet Reason it self is so much for it, as that Faith it self is but the act of elevated well informed Reason; and supernatural Revelation is but the means to inform our Reason, about things which have not a natural evidence, discernible by us. And sanctification (actively taken) is but the healing of our Reason and Rational appetite: And Holiness is but the health or soundness of them. The error of Reason must be renounced by Believers; but not the use of Reason: The sufficiency of Reason and Natural Light without supernatural Light and Help, we must all deny: But to set Reason as Reason in opposition to Faith or Holiness, or Divine Revelation, is as gross a piece of foolery, as to set the visive faculty in opposition to the Light of the Sun, or to its objects. It is the unreasonableness of sinners that is to be cured by Illuminating Grace. They are wise to do evil, but to do good they have no knowledge. Their Reason is wounded, depraved and corrupted about the matters of God: They have Reason to serve the flesh, but not to Master it. God doth renew men by giving them wisdom, and bringing them to a sound mind; As Logic helpeth Reason in discourse and arguing, so Theology informeth Reason about the matters of God and our salvation: and the Spirit of God doth make his Doctrine and Revelation effectual. Make Nature sound, and Reason clear, & then we will consent that all men be persuaded