I. Concerning the nature of assurance, and how far persons may be said to be infallibly assured of their salvation. Assurance is opposed to doubting; which is inconsistent therewith; so that he who has attained this privilege, is carried above all those doubts and fears respecting the truth of grace, and his interest in the love of God, which others are exposed to, whereby their lives are rendered very uncomfortable: It may also be considered as containing in it something more than our being enabled to hope that we are in a state of grace; for though that affords relief against despair, yet it falls short of assurance, which is sometimes called _a full assurance of hope_, Heb. vi. 11. and it certainly contains a great deal more than a probability, or a conjectural persuasion relating to this matter; which is the only thing that some will allow to be attainable by believers, especially they who deny the doctrine of the saints’ perseverance, and lay the greatest stress of man’s salvation on his own free-will, rather than the efficacious grace of God. All that they will own as to this matter is, that persons may be in a hopeful way to salvation, and that it is probable they may attain it at last. But they cannot be fully assured that they shall, unless they were assured concerning their perseverance, which, they suppose, no one can be; because the carrying on of the work of grace depends on the free-will of man, as well as the first beginning of it; and according to their notion of liberty, as has been before observed under another answer[104], _viz._ that he who acts freely may act the contrary; and consequently, since every thing that is done in the carrying on of the work of grace, is done freely; no one can be assured that this work shall not miscarry; therefore none can attain assurance; this is what some assert, but we deny. And it is observed in this answer, that believers may not only attain assurance that they are in a state of grace, and shall persevere therein unto salvation, but that they may be infallibly assured hereof, which is the highest degree of assurance. How far this is attainable by believers, may be the subject of our farther inquiry.