Because people keep blaspheming God By saying he did not create all things such as evil and scripture clearly says that he did : Isaiah 45(7), Prov 16(4) : I must expose that lie about God !
It is utterly the height of blasphemy to falsely accuse God of creating evil.
If the Lord Himself says,
Do men gather grapes of thorns, or figs of thistles? Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit. A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit. (Matthew 7:16-18)
Just because you read that Scripture says God created evil, this does not automatically mean that you should understand the text literally and in a sinful way. Do you then take your literalist perspective and preach that a man must literally cut his hand off if it causes him to stumble? And do you also think that men should literally castrate themselves so that they can be eunuchs for the Kingdom's sake?
But you exceed absurdity by saying that He who is Holy, Pure, All-Good, Giver of Life, is willing to create something entirely contrary to His essence. That is accursed folly. A good God cannot bring forth evil just as
a good tree cannot bring forth evil fruit. Everything that God has created is good, and we were indeed created
very good.
God cannot be tempted with evil, neither tempteth he any man (James 1:13)
In him was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not. (John 1:4-5)
God is light, and in him is no darkness at all. (1 John 1:5)
What shall we say then? Is there unrighteousness with God? God forbid. (Romans 9:14)
Now, if you say that evil is not contrary to the Light, Righteousness, and Life, then you prove yourself a liar. But if you say that evil opposes these things, then repent and cease your blasphemy, and glorify God righteously by deeming Him the Author of Goodness and Life and Righteousness, not evil, not sin, not wickedness, not unrighteousness, not darkness.
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St John of Damascus (7th Century)
It is to be observed that it is the custom in the Holy Scripture to speak of God's permission as His energy, as when the apostle says in the Epistle to the Romans, Hath not the potter power over the clay, of the same lump to make one vessel unto honour and another unto dishonour? And for this reason, that He Himself makes this or that. For He is Himself alone the Maker of all things; yet it is not He Himself that fashions noble or ignoble things, but the personal choice of each one. And this is manifest from what the same Apostle says in the Second Epistle to Timothy, In a great house there are not only vessels of gold and of silver, but also of wood and of earth: and some to honour and some to dishonour. If a man therefore purge himself from these, he shall be a vessel unto honour sanctified, and meet for the master's use, and prepared unto every good work. And it is evident that the purification must be voluntary: for if a man, he saith, purge himself. And the consequent antistrophe responds, "If a man purge not himself he will be a vessel to dishonour, unmeet for the master's use and fit only to be broken in pieces." Wherefore this passage that we have quoted and this, God hath concluded them all in unbelief, and this, God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear, all these must be understood not as though God Himself were energising, but as though God were permitting, both because of free-will and because goodness knows no compulsion.
His permission, therefore, is usually spoken of in the Holy Scripture as His energy and work. Nay, even when He says that God creates evil things, and that there is no evil in a city that the Lord hath not done, he does not mean by these words that the Lord is the cause of evil, but the word 'evil' is used in two ways, with two meanings. For sometimes it means what is evil by nature, and this is the opposite of virtue and the will of God: and sometimes it means that which is evil and oppressive to our sensation, that is to say, afflictions and calamities. Now these are seemingly evil because they are painful, but in reality are good. For to those who understand they became ambassadors of conversion and salvation. The Scripture says that of these God is the Author.
It is, moreover, to be observed that of these, too, we are the cause: for involuntary evils are the offspring of voluntary ones.