What do the scriptures make known of God?
The scriptures make known what God is,1 the persons in the Godhead,2 his decrees,3 and the execution of his decrees.4
Scripture proofs
The Westminster Assembly's proof texts (KJV). The bracketed numbers in the answer above mark the clause each set of references supports; expand a row to read the verses.
1 Heb. 11:6
But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
2 1 John 5:7
For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
3 Acts 15:14–15, 18
Acts 15:14 Simeon hath declared how God at the first did visit the Gentiles, to take out of them a people for his name.
Acts 15:15 And to this agree the words of the prophets; as it is written,
Acts 15:18 Known unto God are all his works from the beginning of the world.
4 Acts 4:27–28
Acts 4:27 For of a truth against thy holy child Jesus, whom thou hast anointed, both Herod, and Pontius Pilate, with the Gentiles, and the people of Israel, were gathered together,
Acts 4:28 For to do whatsoever thy hand and thy counsel determined before to be done.
This doctrine across the Standards
Where the Confession and the Westminster Shorter Catechism treat the same matter, so the question can be studied alongside its parallel statements.
In the Westminster Confession
II.1 There is but one only living and true God, who is infinite in being and perfection, a most …
There is but one only living and true God, who is infinite in being and perfection, a most pure spirit, invisible, without body, parts, or passions, immutable, immense, eternal, incomprehensible, almighty, most wise, most holy, most free, most absolute, working all things according to the counsel of his own immutable and most righteous will, for his own glory; most loving, gracious, merciful, long-suffering, abundant in goodness and truth, forgiving iniquity, transgression, and sin; the rewarder of them that diligently seek him; and withal most just and terrible in his judgments; hating all sin, and who will by no means clear the guilty.
→ II.1 · Of God, and of the Holy TrinityII.2 God hath all life, glory, goodness, blessedness, in and of himself; and is alone in and unto himself …
God hath all life, glory, goodness, blessedness, in and of himself; and is alone in and unto himself all-sufficient, not standing in need of any creatures which he hath made, nor deriving any glory from them, but only manifesting his own glory in, by, unto, and upon them: he is the alone fountain of all being, of whom, through whom, and to whom are all things; and hath most sovereign dominion over them, to do by them, for them, or upon them whatsoever himself pleaseth. In his sight all things are open and manifest; his knowledge is infinite, infallible, and independent upon the creature; so as nothing is to him contingent or uncertain. He is most holy in all his counsels, in all his works, and in all his commands. To him is due from angels and men, and every other creature, whatsoever worship, service, or obedience, he is pleased to require of them.
→ II.2 · Of God, and of the Holy TrinityIn the Westminster Shorter Catechism
Q.4 What is God?
God is a Spirit, infinite, eternal, and unchangeable in his being, wisdom, power, holiness, justice, goodness, and truth.
→ Open Q.4Q.5 Are there more Gods than one?
There is but one only, the living and true God.
→ Open Q.5