3. Another thing that vastly concerns the future prosperity of this town, is, that you should watch against the encroachments of error; and particularly Arminianism and doctrines of like tendency. You were, many of you, as I well remember, much alarmed with the apprehension of the danger of the prevailing of these corrupt principles near sixteen years ago. But the danger then was small in comparison of what appears now. These doctrines at this day are much more prevalent than they were then: the progress they have made in the land, within this seven years, seems to have been vastly greater than at any time in the like space before: and they are still prevailing and creeping into almost all parts of the land, threatening the utter ruin of the credit of those doctrines which are the peculiar glory of the gospel, and the interests of vital piety. And I have of late perceived some things among yourselves that show that you are far from being out of danger, but on the contrary remarkably exposed. The older people may perhaps think themselves sufficiently fortified against infection; but it is fit that all should beware of self-confidence and carnal security, and should remember those needful warnings of sacred writ, "Be not high-minded, but fear;" and "let him that stands, take heed lest he fall." But let the case of the older people be as it will, the rising generation are doubtless greatly exposed. These principles are exceeding taking with corrupt nature, and are what young people, at least such as have not their hearts established with grace, are easily led away with. And if these principles should greatly prevail in this town, as they very lately have done in another large town I could name, formerly greatly noted for religion, and so for a long time, it will threaten the spiritual and eternal ruin of this people in the present and future generations. Therefore you have need of the greatest and most diligent care and watchfulness with respect to this matter. 4. Another thing which I would advise to, that you may hereafter be a prosperous people, is, that you would give yourselves much to prayer. God is the fountain of all blessing and prosperity, and he will be sought to for his blessing. I would therefore advise you not only to be constant in secret and family prayer, and in the public worship of God in his house, but also often to assemble yourselves in private praying societies. I would advise all such as are grieved for the afflictions of Joseph, and sensibly affected with the calamities of this town, of whatever opinion they be with relation to the subject of our late controversy, often to meet together for prayer, and to cry to God for his mercy to themselves, and mercy to this town, and mercy to Zion and the people of God in general through the world.