1. There are many things relating to the promises, as to the largeness and straitness of words, as to the freeness and conditionality of them, which we are not able so well to understand; and, therefore, when Satan dealeth with us about them, we quickly fall to the ground before him; we often conclude that the words of the promise are too narrow and strait to comprehend us; we also think, verily, that the conditions of some promises do utterly shut us out from hope of justification and life; but our Advocate, who is for us with the Father, he is better acquainted with, and learned in, this law than to be baffled out with a bold word or two, or with a subtle piece of hellish sophistication (Isa 50:4). He knows the true purport, intent, meaning, and sense of every promise, and piece of promise that is in the whole Bible, and can tell how to plead it for advantage against our accuser, and doth so.
And I gather it not only from his contest with Satan for Joshua (Zech 3), and from his conflict with him in the wilderness (Matt 4), and in heaven (Rev 14) but also from the practice of Satan's emissaries here; for what his angels do, that doth he. Now there is here nothing more apparent than that the instruments of Satan do plead against the church, from the pretended intricacy, ambiguity, and difficulty of the promise; whence I gather, so doth Satan before the tribunal of God; but there we have one to match him; "we have an Advocate with the Father," that knows law and judgment better than Satan, and statute and commandment better than all his angels; and by the verdict of our Advocate, all the words, limits, and extensions of words, with all conditions of the promises, are expounded and applied! And hence it is that it sometimes so falls out that the very promise we have thought could not reach us, to comfort us by any means, has at another time swallowed us up with joy unspeakable. Christ, the true Prophet, has the right understanding of the Word as an Advocate, has pleaded it before God against Satan, and having overcome him at the common law, he hath sent to let us know it by his good Spirit, to our comfort and the confusion of our enemy. Again,
2. There are many things relating to our lives that minister to our accuser occasions of many objections against our salvation; for, besides our daily infirmities, there are in our lives gross sins, many horrible backslidings; also we ofttimes suck and drink in many abominable errors and deceitful opinions, of all which Satan accuseth us before the judgment-seat of God, and pleadeth hard that we may be damned forever for them. Besides, some of these things are done after the light is received, against present convictions and dissuasions to the contrary, against solemn engagements to amendment, when the bonds of love were upon us (Jer 2:20). These are crying sins; they have a loud voice in themselves against us, and give to Satan great advantage and boldness to sue for our destruction before the bar of God; nor doth he want skill to aggravate and to comment profoundly upon all occasions and circumstances that did attend us in these our miscarriages-to wit, that we did it without a cause, also, when we had, had we had the grace to have used them, many things to have helped us against such sins, and to have kept us clean and upright.
"There is also a sin unto death," (I John 5:16), and he can tell how to labor, by argument and sleight of speech, to make our transgressions, not only to border upon, but to appear in the hue, shape, and figure of that, and thereto make his objection against our salvation. He often argueth thus with us, and fastens the weight of his reasons upon our consciences, to the almost utter destruction of us, and the bringing of us down to the gates of despair and utter destruction; the same sins, with their aggravating circumstances, as I said, he pleaded against us at the bar of God. But there he meets with Jesus Christ, our Lord, and Advocate, who enters his plea against him, unravels all his reasons and arguments against us, and shows the guile and falsehood of them.
He also pleadeth as to the nature of sin, as also to all those high aggravations, and proveth that neither the sin in itself, nor yet as joined with all its advantageous circumstances, can be the sin unto death, (Col 2:19), because we hold the head, and have not "made shipwreck of faith," (I Tim 1:19), but still, as David and Solomon, we confess, and are sorry for our sins. Thus, though we seem, through our falls, to come short of the promise, with Peter, (Heb 4:1-3), and leave our transgressions as stumbling blocks to the world, with Solomon, and minister occasion of a question of our salvation among the godly, yet our Advocate fetches us off before God, and we shall be found safe and in heaven at last, by them in the next world, who were afraid they had lost us in this.