God created the first man from the dust of the earth and breathed life into his soul.

So also it is written, “The first MAN, Adam, BECAME A LIVING SOUL.” The last Adam became a life-giving spirit (1 Cor 15.45; cf. Gen 2.4-25; 3.19; Ecc 3.20).

God’s one requirement was that man honor Him as God in complete obedience.

For whoever keeps the whole law and yet stumbles in one point, he has become guilty of all (Jas 2.10; cf. Gen 2.16-17).

By Adam’s disobedience, sin, death, and condemnation entered the world.

Therefore, just as through one man sin entered into the world, and death through sin, and so death spread to all men, because all sinned (Rom 5.12; cf. 5.18).

Because of Adam, mankind is born into sin with a rebellious nature against God.  

Behold, I was brought forth in iniquity, and in sin my mother conceived me (Ps 51.5; cf. Jer 17.9; Matt 15.19-20; Luke 18.19; Rom 3.10, 23).

As sinners all men deserve God’s eternal punishment.

But because of your stubbornness and unrepentant heart you are storing up wrath for yourself in the day of wrath and revelation of the righteous judgment of God (Rom 2.5; cf. Mark 9.43; Matt 25.46; Rom 2.3; 6.23).

Rather than meriting favor with God, all that man is and does is corrupted by his sin.

Knowing that a man is not justified by the works of the Law but through faith in Christ Jesus, even we have believed in Christ Jesus, so that we may be justified by faith in Christ and not by the works of the Law; since by the works of the Law no flesh will be justified (Gal 2.16; cf. Isa 64.6; Rev 20.12; 21.8).

Because of his sin nature, man is left completely unable to absolve his debt of sin. 

He saved us, not on the basis of deeds which we have done in righteousness, but according to His mercy, by the washing of regeneration and renewing by the Holy Spirit (Titus 3.5; cf. Rom 4.4).