Do you mortify; do you make it your daily work; be always at it whilst you live; cease not a day from this work; be killing sin or it will be killing you.Of the Mortification of Sin in Believers Chapter 2
That is why the unregenerate person cannot understand the urgency of the gospel message: until they see the depth of their sin and the holiness of God, they find no reason to seek remedy for their condition.
When I turn to the map of the world I must say the same thing. It matters not what quarter I examine: I find men's hearts are everywhere the same, and everywhere wicked. Sin is the family disease of all the children of Adam.Old Paths, Ch 7
You can never part with sin soon enough; it is a cursed inmate, that will surely bring mischief upon the soul that harbours it. It will set its own dwelling on fire.Works 7:147
At the heart of all sin is a lie. The lie says to all of us in our sin, "The act you are now doing, the desire or attitude you are now feeling is not very bad because there are much worse things, not very bad because everyone else experiences the same things, not very bad because you can't help it, not very bad because there is no God, or, if that won't work, God knows you are but frail and weak and he will tolerate and pity your sin." There are a thousand distortions of the truth which sin brings with it into the human heart, so that Jeremiah cries out, "The heart is deceitful above all things and desperately corrupt; who can understand it?" (17:9).
Sin may be comprehensively defined as lack of conformity to the law of God in act, habit, attitude, outlook, disposition, motivation, and mode of existence.Concise Theology, Section 31
How monstrous a thing is rebellion! How direful a doom is prepared for the ungodly! My soul, never laugh at sin's fooleries, lest thou come to smile at sin itself. It is thine enemy, and thy Lord's enemy. View it with detestation
When the apostle says that 'faith is by hearing' (Rom. 10:17), he does indeed give us to understand that the ministry of the church ought to come in as the ordinary means of producing faith in adults. He does not teach, however, that the church is clearer and better known than the Scriptures.
Good works are required as the means and way for possessing salvation. Even though they don't contribute anything to the acquisition of our salvation, they are necessary to the obtainment of it. No one can be saved without them.
We do not deny that the church has many functions in relation to the Scriptures. She is: (1) the keeper of the oracles of God to whom they are committed and who preserves the authentic tables of the covenant of grace with the greatest fidelity, like a notary (Rom. 3:2); (2) the guide, to point out the Scriptures and lead us to them (Is. 30:21); (3) the defender, to vindicate and defend them by separating the genuine books from the spurious, in which sense she may be called the ground of the truth (1 Tim. 3:15*); (4) the herald who sets forth and promulgates them (2 Cor. 5:19; Rom. 10:16); (5) the interpreter inquiring into the unfolding of the true sense. But all these imply a ministerial only and not a magisterial power.
The reading and contemplation of the Scriptures is enjoined upon men of all languages, therefore the translation of it into the native tongues is necessary. Since men speak different languages and are not all familiar with those two in which it was first written, it cannot be understood by them unless translated; it comes as the same thing to say nothing at all and to say what nobody can understand. But here it happens by the wonderful grace of God that the division of tongues (which formerly was the sign of a curse) becomes now the proof of a heavenly blessing. What was introduced to destroy Babel is now used to build up the mystical Zion.
It was not necessary for the apostles to write a catechism so as to deliver their doctrines professedly. It was enough for them to hand down to us those doctrines in accordance with which all symbolical books and catechisms might be constructed. If they did not formally write a catechism, they did materially leave us either in the gospels or in the epistles those things by which we can be clearly taught the principles of religion (katécheisthai).
If theology takes some things from other systems, it is not as an inferior from superiors, but as an superior from inferiors (as a mistress freely using her handmaids). Theology does not so much take from others, as presupposes certain previously known things upon which it builds revelation.
Institutes of Elenctic Theology
That God is the object of theology is evident both from the very name (theologias and theosebeias), and from Scripture which recognizes no other principal object.Institutes of Elenctic Theology