Creation and sin
When God finished creation on the sixth day, He saw that it was "very good." At this point sin had not entered the world. How is it that Satan or Adam and Eve were able to conceive of the idea to disobey God and sin if they were created perfectly? Thank you!
Adam and Eve did not conceive of the idea to disobey God and sin. That idea came from Satan. Sometime after God created everything, Satan and other angels rebelled against God (2 Peter 2:4; Jude 6). In the form of a serpent, Satan then tempted Eve. By giving in to temptation, sin entered the world. As perfect beings, those whom God created had the ability to sin.
The good news of the Bible is that Jesus Christ destroyed the works of the devil (1 John 3:8) by his holy life, innocent suffering and death, and glorious resurrection.