Man in his natural state does not have the ability to know good/evil.
Ge 3:4 And the serpent said unto the woman, Ye shall not surely die:
5 For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil.
Ge 3:7 And the eyes of them both were opened, and they knew that they were naked;
You won't know you're "naked" until you know good/evil.
Joh 9:41 Jesus said unto them, If ye were blind, ye should have no sin: but now ye say, We see; therefore your sin remaineth.
Man is born dead in his trespasses and has no desire to come out, nor can man freely choose.
Joh 3:19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.
20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.
21 But he that doeth truth cometh to the light,
Ro 10:14 How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher?
Ro 10:17 So then faith cometh by hearing, and hearing by the word of God.
Ro 10:21 But to Israel (and the world) he saith, All day long I have stretched forth my hands unto a disobedient and gainsaying people.
Mt 22:3 And sent forth his servants to call them that were bidden to the wedding: and they would not come.
When God comes in and regenerates man, man can see his sad state and then is able to embrace God. There is no good in natural man, there is common grace that allows a man to do perceived good but they never do it with right motives I will paste this and hopefully you'll better understand:
God gave the law that man could "KNOW" his "Evil" when compared to the "Good", who hasn't heard of the "Ten Commandments",
but whether man will "confess" to his sin or not is a "Choice" left up to man.
20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds (Sin) should be reproved.
Ro 6:16 Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey;
whether of sin unto death, or of obedience unto righteousness?