1. God's people are fruitful in good works according to the proportion of their faith; if they be slender in good works, it is because they are weak in faith. Little faith is like small candles, or weak fire, which though they shine and have heat; yet but dim shining and small heat, when compared with bigger candles and greater fire. The reason why Sardis had some in it whose works were not perfect before God, it was, because they did not hold fast by faith the word that they had formerly heard and received (Rev 3:1-3).

2. There may be a great mistake in our judging of our own fruitfulness. The soul that indeed is candid and right at heart, is taught by grace to judge itself, though fruitful, yet barren upon two accounts. (1.) When it compareth its life to the mercy bestowed upon it: for when a soul doth indeed consider the greatness and riches of the mercy bestowed upon it, then it must needs cry out, 'O wretched man that I am,' (Rom 7:24) for it seeth itself wonderfully to fall short of a conversation becoming one who hath received so great a benefit. (2.) It may also judge itself barren, because it falleth so far short of that it would attain unto, 'it cannot do the thing that it would' (Gal 5:17).

3. The heart of a Christian is naturally very barren; upon which, though the seed of grace, that is the fruitfullest of all seeds, be sown, yet the heart is naturally subject to bring forth weeds (Mat 15:19). Now, to have a good crop from such ground, doth argue the fruitfulness of the seed. Wherefore I conclude upon these three things, (1.) That the seed of faith is a very fruitful seed, in that it will be fruitful in so barren a soil. (2.) That faith is not beholden to the heart, but the heart to it, for all its fruitfulness. (3.) That therefore the way to be a more fruitful Christian, it is to be stronger in believing.

SECOND

Now for the second thing, to wit, That every one that believeth should be careful that their works be good. This followeth from what went just before; to wit, That the heart of a Christian is a heart subject to bring forth weeds.

There is flesh as well as spirit in the best of saints: and as the spirit of grace will be always putting forth something that is good, so the flesh will be putting forth continually that which is evil. 'For the flesh lusteth against the Spirit, and the Spirit against the flesh' (Gal 5:17).

Now this considered, is the cause why you find so often in the Scriptures so many items and cautions to the Christians to look to their lives and conversations. As, 'Keep thy heart with all diligence' (Prov 4:23). 'Watch ye, stand fast in the faith, quit you like men, be strong' (1 Cor 16:13). 'Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap. For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting' (Gal 6:7,8).

All works are not good that seem to be so. It is one thing for a man's ways to be right in his own eye, and another for them to be right in God's. Often 'that which is highly esteemed among men is abomination in the sight of God' (Prov 30:12; Luke 16:15).

Seeing corruption is not yet out of our natures, there is a proneness in us to build [even] upon the right foundation, wood, hay, and stubble, instead of gold and silver, and precious stones (1 Cor 3:11-15). How was both David the king, Nathan the prophet, and Uzza the priest, deceived, touching good works! (1 Chron 17:1-4; 13:9-11). Peter also, in both his defending his Master in the garden, and in dissuading of him from his sufferings, though both out of love and affection to his Master, was deceived touching good works. (Matt 16:22,23; John 18:10,11). Many have miscarried both as to doctrine, worship, and the prosecution of each.

First, For doctrine. Christ tells the Jews, that they taught for the doctrines of God the doctrines and traditions of men (Matt 15:9; Mark 7:7). As also, saith the apostle, They teach 'things they ought not, for filthy lucre's sake' (Titus 1:11).