By the decree of God, for the manifestation of his glory, some men and angels are predestined, or foreordained to eternal life through Jesus Christ, to the praise of his glorious grace; others being left to act in their sin to their just condemnation, to the praise of his glorious justice. ( 1 Timothy 5:21; Matthew 25:34; Ephesians 1:5, 6; Romans 9:22, 23; Jude 4 )  Chapter 3, para. 3.

Chapter 20.  Of the Gospel, and of the Extent of the Grace Thereof...

The revelation of the gospel unto sinners, made in divers times and by sundry parts, with the addition of promises and precepts for the obedience required therein, as to the nations and persons to whom it is granted, is merely of the sovereign will and good pleasure of God; not being annexed by virtue of any promise to the due improvement of men's natural abilities, by virtue of common light received without it, which none ever did make, or can do so; and therefore in all ages, the preaching of the gospel has been granted unto persons and nations, as to the extent or straitening of it, in great variety, according to the counsel of the will of God.
( Psalms 147:20; Acts 16:7; Romans 1:18-32 )

Chapter 20.  Of the Gospel, and of the Extent of the Grace Thereof...

This promise of Christ, and salvation by him, is revealed only by the Word of God; neither do the works of creation or providence, with the light of nature, make discovery of Christ, or of grace by him, so much as in a general or obscure way; much less that men destitute of the revelation of Him by the promise or gospel, should be enabled thereby to attain saving faith or repentance.
( Romans 1:17; Romans 10:14,15,17; Proverbs 29:18; Isaiah 25:7; Isaiah 60:2, 3 )

The reading of the Scriptures, preaching, and hearing the Word of God, teaching and admonishing one another in psalms, hymns, and spiritual songs, singing with grace in our hearts to the Lord; as also the administration of baptism, and the Lord's supper, are all parts of religious worship of God, to be performed in obedience to him, with understanding, faith, reverence, and godly fear; moreover, solemn humiliation, with fastings, and thanksgivings, upon special occasions, ought to be used in an holy and religious manner. ( 1 Timothy 4:13; 2 Timothy 4:2; Luke 8:18; Colossians 3:16; Ephesians 5:19; Matthew 28:19, 20; 1 Corinthians 11:26; Esther 4:16; Joel 2:12; Exodus 15:1-19, Psalms 107 ) ​​Chapter 22, Paragraph 5. 

Prayer, with thanksgiving, being one part of natural worship, is by God required of all men. But that it may be accepted, it is to be made in the name of the Son, by the help of the Spirit, according to his will; with understanding, reverence, humility, fervency, faith, love, and perseverance; and when with others, in a known tongue. ( Psalms 95:1-7; Psalms 65:2; John 14:13, 14; Romans 8:26; 1 John 5:14; 1 Corinthians 14:16, 17 ) ​​Chapter 22, Paragraph  3. 

​Religious worship is to be given to God the Father, Son, and Holy Spirit, and to him alone; not to angels, saints, or any other creatures; and since the fall, not without a mediator, nor in the mediation of any other but Christ alone. ( Matthew 4:9, 10; John 6:23; Matthew 28:19; Romans 1:25; Colossians 2:18; Revelation 19:10; John 14:6; 1 Timothy 2:5 ) Chapter 2, Para 2

1689 London Baptist Confession
Chapter 1: Of the Holy Scriptures

1. The Holy Scripture is the only sufficient, certain, and infallible rule of all saving knowledge, faith, and obedience, although the light of nature, and the works of creation and providence do so far manifest the goodness, wisdom, and power of God, as to leave men inexcusable; yet are they not sufficient to give that knowledge of God and his will which is necessary unto salvation.3  Therefore it pleased the Lord at sundry times and in divers manners to reveal himself, and to declare that his will unto his church; and afterward for the better preserving and propagating of the truth, and for the more sure establishment and comfort of the church against the corruption of the flesh, and the malice of Satan, and of the world, to commit the same wholly unto writing; which maketh the Holy Scriptures to be most necessary, those former ways of God's revealing his will unto his people being now ceased.
12 Timothy 3:15-17; Isaiah 8:20; Luke 16:29, 31; Ephesians 2:20; 2Romans 1:19-21; Romans 2:14,15; Psalms 19:1-3; 3Hebrews 1:1; 4Proverbs 22:19-21; Romans 15:4; 2 Peter 1:19,20

1689 London Baptist Confession
Chapter 13: Of Sanctification

1. They who are united to Christ, effectually called, and regenerated, having a new heart and a new spirit created in them through the virtue of Christ's death and resurrection, are also farther sanctified, really and personally, through the same virtue, by His Word and Spirit dwelling in them; the dominion of the whole body of sin is destroyed, and the several lusts thereof are more and more weakened and mortified, and they more and more quickened and strengthened in all saving graces, to the practice of all true holiness, without which no man shall see the Lord.
( Acts 20:32; Romans 6:5, 6; John 17:17; Ephesians 3:16-19; 1 Thessalonians 5:21-23; Romans 6:14; Galatians 5:24; Colossians 1:11; 2 Corinthians 7:1; Hebrews 12:14 )

2. This sanctification is throughout the whole man, yet imperfect in this life; there abideth still some remnants of corruption in every part, whence ariseth a continual and irreconcilable war; the flesh lusting against the Spirit, and the Spirit against the flesh.
( 1 Thessalonians 5:23; Romans 7:18, 23; Galatians 5:17; 1 Peter 2:11 )

3. In which war, although the remaining corruption for a time may much prevail, yet through the continual supply of strength from the sanctifying Spirit of Christ, the regenerate part doth overcome; and so the saints grow in grace, perfecting holiness in the fear of God, pressing after an heavenly life, in evangelical obedience to all the commands which Christ as Head and King, in His Word hath prescribed them.
( Romans 7:23; Romans 6:14; Ephesians 4:15, 16; 2 Corinthians 3:18; 2 Corinthians 7:1 )

1689 London Baptist Confession
Chapter 9: Of Free Will

Para. 3. Man, by his fall into a state of sin, hath wholly lost all ability of will to any spiritual good accompanying salvation; so as a natural man, being altogether averse from that good, and dead in sin, is not able by his own strength to convert himself, or to prepare himself thereunto. 
( Romans 5:6; Romans 8:7; Ephesians 2:1, 5; Titus 3:3-5; John 6:44 )

Para. 4. When God converts a sinner, and translates him into the state of grace, he frees him from his natural bondage under sin, and by his grace alone enables him freely to will and to do that which is spiritually good; yet so as that by reason of his remaining corruptions, he doth not perfectly, nor only will, that which is good, but doth also will that which is evil. 
( Colossians 1:13; John 8:36; Philippians 2:13; Romans 7:15, 18, 19, 21, 23 )

1689 London Baptist Confession
Chapter 27, Paragraph 1: Of the Communion of Saints

1. All saints that are united to Jesus Christ, their head, by his Spirit, and faith, although they are not made thereby one person with him, have fellowship in his graces, sufferings, death, resurrection, and glory; and, being united to one another in love, they have communion in each others gifts and graces, and are obliged to the performance of such duties, public and private, in an orderly way, as do conduce to their mutual good, both in the inward and outward man. 

( 1 John 1:3; John 1:16; Philippians 3:10; Romans 6:5, 6; Ephesians 4:15, 16; 1 Corinthians 12:7; 1 Corinthians 3:21-23; 1 Thessalonians 5:11, 14; Romans 1:12; 1 John 3:17, 18; Galatians 6:10 )