And as to the other rule, _viz._ that a mark must contain an essential property of that which it evinces: it follows from hence, that our engaging in holy duties, without the exercise of grace therein; or our extending charity to the poor, when it does not proceed from faith or love to God, &c. is no certain evidence of the truth of grace, since a person may perform these duties and yet be destitute hereof; whereas, that which is essential to a thing, is inseparable from it. Thus concerning marks of grace in general; which I could not but think necessary to premise, inasmuch as some have entertained prejudices against all marks of grace, and seem to assert, that a believer is not to judge of his state thereby; than which, nothing seems more absurd. If they who are thus prejudiced against them, have nothing to say in defence thereof, but that some assign those things to be marks of grace which are not so, and thereby lead themselves and others, into mistakes about them; what has been premised concerning the nature of a mark, or evidence, may, in some measure, fence against this prejudice, as well as prepare our way for what may be said concerning them. Therefore we shall, _First_, consider those things which can hardly be reckoned marks of grace; and, _Secondly_, what marks we may judge of ourselves by. _First_, As to the former of these, what are not to be reckoned marks of grace. 1. We are not to conclude that a person is in a state of grace, barely because he has a strong impression on his own spirit that he is so; since that is accidental, and not essential to grace, and many are mistaken with respect to this matter. It is not to be doubted, but they whom our Saviour represents as saying, _Lord, Lord, have we not prophesied in thy name, and in thy name have cast out devils, and in thy name done many wonderful works_, Matt. vii. 2. had a strong persuasion founded on this evidence, that they were in a state of grace, till they found themselves mistaken, when he commanded them to _depart from him_? Nothing is more obvious than that many presume they are something when they are nothing; and, indeed, a persuasion that a person is in a state of grace, barely because he cannot think otherwise of himself, the thing being impressed on his spirit, without any other evidence, lays such an one too open to the charge of enthusiasm.