God is not the author of sin but He is the cause of sin. That is what the Bible teaches:

And for this cause God shall send them strong delusion, that they should believe a lie: (2 Thessalonians 2:11 KJV)

Now therefore, behold, the LORD hath put a lying spirit in the mouth of all these thy prophets, and the LORD hath spoken evil concerning thee. (1 Kings 22:23 KJV)

I am the author of what I have written here. But God is the cause of my being here and having the ability to say this in the first place. Thus, God is the ultimate cause behind all that happens. He could have cut me off so that I could not say anything else. Whatever comes to pass is ordained of God.

12. What are the decrees of God?

Answer: God's decrees are the wise, free, and holy acts of the counsel of his will,1 whereby, from all eternity, he hath, for his own glory, unchangeably foreordained whatsoever comes to pass in time,2 especially concerning angels and men.

See also: WCF 3.1 | WSC 7


1 Eph. 1:11; Rom. 11:33; Rom. 9:14,15,18.

2 Eph. 1:4,11; Rom. 9:22,23; Ps. 33:11.

13. What hath God especially decreed concerning angels and men?

Answer: God, by an eternal and immutable decree, out of his mere love, for the praise of his glorious grace, to be manifested in due time, hath elected some angels to glory;1 and in Christ hath chosen some men to eternal life, and the means thereof:2 and also, according to his sovereign power, and the unsearchable counsel of his own will, [whereby he extendeth or withholdeth favour as he pleaseth,] hath passed by and foreordained the rest to dishonour and wrath, to be for their sin inflicted, to the praise of the glory of his justice.3

See also: WCF 3.3-4


1 1 Tim. 5:21

2 Eph. 1:4-6; 2 Thess. 2:13,14.

3 Rom. 9:17,18,21,22; Matt. 11:25,26; 2 Tim. 2:20; Jude 4; 1 Pet 2:8.

14. How doth God execute his decrees?

Answer: God executeth his decrees in the works of creation and providence, according to his infallible foreknowledge, and the free and immutable counsel of his own will.1

For "who has known the mind of the LORD that he may instruct Him?" But we have the mind of Christ. (1 Corinthians 2:16 NKJ)