Can We Obey God Or Not?

If it is not possible for any person to obey God after Adam's sin, then how did these people obey? 1 Kings 15:5 Because David did that which was right in the eyes of the LORD, and turned not aside from any thing that he commanded him all the days of his life, save only in the matter of Uriah the Hittite. 1 Kings 15:11 And Asa did that which was right in the eyes of the LORD, as did David his father. 2 Chronicles 14:2 And Asa did that which was good and right in the eyes of the LORD his God: 2 Chronicles 24:2 And Joash did that which was right in the sight of the LORD all the days of Jehoiada the priest. Genesis 26:5 Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws. Joshua 22:2 And said unto them, Ye have kept all that Moses the servant of the LORD commanded you, and have obeyed my voice in all that I commanded you: Haggai 1:12 Then Zerubbabel the son of Shealtiel, and Joshua the son of Josedech, the high priest, with all the remnant of the people, obeyed the voice of the LORD their God, and the words of Haggai the prophet, as the LORD their God had sent him, and the people did fear before the LORD. Did Adam or his descendants lose the ability to obey God after Adam's sin? No!! The Bible tells the story of many people, some who walked with God and did what was pleasing in His sight and others who rebelled against God and did evil in His sight. It would be impossible to rebel or obey without the freedom to do so. Joshua 24:15 "And if it seem evil unto you to serve the LORD, choose you this day whom you will serve; whether the gods which your fathers served that were on the other side of the flood, or the gods of the Amorites, in whose land you dwell: but as for me and my house, we will serve the LORD." KJV Isaiah 1:19-20 "If you be willing and obedient, you shall eat the good of the land: but if you refuse and rebel, you shall be devoured with the sword: for the mouth of the LORD has spoken it." KJV These passages prove that all of Adam's offspring still had the ability to obey or refuse God. What about Enoch and others who really followed Gods commands? Again, it would not be possible to obey God if they did not have this ability.