In this apostolical sentence is contained a brief description of a Christian’s life, and of the main study about which he is employed, namely, the study of godliness, or of Christian piety, which comprehends in it the whole train of Christian virtues. The apostle makes use of two motives to recommend this heavenly study, and the constant practice of it. _First_, says he, “Godliness is profitable unto all things.” Godliness is of most admirable service, as soon as our words and actions are influenced by it. It renders the whole life acceptable to God, and useful to our neighbor. The _second_ motive is, because godliness is accompanied with a gracious reward both in this life, as appears from the examples of Joseph, of Daniel, and of others, as well as in that which is to come; where we shall reap without ceasing, provided we do not faint while we dwell here. Gal. 6:9. For our better encouragement in the practice of piety, let us endeavor to keep in remembrance the following rules and considerations. I. If thou even canst not live up to that degree of holiness which the word of God requires, and which thou thyself desirest, yet thou must never cease _ardently_ to _wish_ for it; for such holy breathings are always acceptable to God. God does not so much regard the outward action of a man, as the heart whence the action proceeds. But after all, never neglect to crucify thy flesh, and never permit it to rule over thee. II. In all that thou thinkest and doest, be careful to preserve the _purity of thy heart_. Set a watch over it, lest thou be defiled with proud thoughts, words, or actions; with wrath, or other such works of the flesh, and of the devil. Sin opens the door to the devil, and shuts the heart against God. III. Study continually to maintain the Christian liberty of thy soul, and do not suffer thyself to be enslaved, or brought into bondage, by any inordinate love of the creature, or of the things of this world, whose lord and master thou oughtest to be. Consider the value of thy soul, which certainly is of a more noble nature than this present perishing world. Why shouldest thou degrade it so far, as to subject it to the frail, base, and frivolous things of this life? IV. Beware of the care and _sorrow of this world_, because it worketh death. 2 Cor. 7:10. As _worldly_ sorrow begetteth death, so _godly_ sorrow begetteth life, and lays up an eternal treasure! Worldly sorrow springs from avarice and envy; from excessive care; from unbelief and impatience; and other temporal sources. Godly sorrow proceeds from a knowledge of thy sins, and those eternal punishments which follow them. This sorrow produces many salutary effects in a penitent soul, and “worketh repentance to salvation, not to be repented of;” being attended with spiritual joy, and solid peace or tranquillity of mind. No loss of a temporal kind ought to afflict thee so much as the remembrance of thy sins, by which thou hast offended the infinite goodness of God.