Because they sinned as our representative head, God will punish the human race, just as he promised. This may sound harsh, until you realize the other side of the coin. Jesus Christ died for the ungodly, and He is the second Adam, that is to say the representative head of the 2nd covenant. That covenant is the covenant of grace. So if you fall under Christ's covenant, and you die with Christ (as a believer, mental illnesses aside like dementia), you will be likewise raised with Christ. The proof is that no human born of a man and woman has achieved perfection. Jesus was born as seed from the Holy Spirit (insert the trinity), of a woman (his mother, Mary), and had only appeared as a human in times past (much like the angels, who are normally described as 6 winged creatures, 2 covering the head, 2 the feet, and 2 to fly). This allowed Jesus, born a man, yet still somehow God (miracles, reading people's thoughts, and knowledge of the future at a minimum), to become the cornerstone of the covenant, the key to its operation. G.R.A.C.E. God's Riches At Christ's Expense. We are given the riches of God through the expense of the sacrifice of Christ on the cross.