Illusion - something that deceives the senses or mind, for example, by appearing to exist when it does not or appearing to be one thing when it is in fact another.
Delusion – a false or mistaken belief or idea about something. psychology - a persistent false belief held in the face of strong contradictory evidence, especially as a symptom of psychiatric disorder.
15 The LORD God took the man and put him in the garden of Eden to till it and keep it. 16 And the LORD God commanded the man, "You may freely eat of every tree of the garden; 17 but of the tree of the knowledge of good and evil you shall not eat, for in the day that you eat of it you shall die."
1 Now the serpent was more crafty than any other wild animal that the LORD God had made. He said to the woman, "Did God say, 'You shall not eat from any tree in the garden'?" 2 The woman said to the serpent, "We may eat of the fruit of the trees in the garden; 3 but God said, 'You shall not eat of the fruit of the tree that is in the middle of the garden, nor shall you touch it, or you shall die.'" 4 But the serpent said to the woman, "You will not die; 5 for God knows that when you eat of it your eyes will be opened, and you will be like God, knowing good and evil." 6 So when the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was to be desired to make one wise, she took of its fruit and ate; and she also gave some to her husband, who was with her, and he ate. 7 Then the eyes of both were opened, and they knew that they were naked; and they sewed fig leaves together and made loincloths for themselves.
8 They heard the sound of the LORD God walking in the garden at the time of the evening breeze, and the man and his wife hid themselves from the presence of the LORD God among the trees of the garden. 9 But the LORD God called to the man, and said to him, "Where are you?" 10 He said, "I heard the sound of you in the garden, and I was afraid, because I was naked; and I hid myself." 11 He said, "Who told you that you were naked? Have you eaten from the tree of which I commanded you not to eat?" 12 The man said, "The woman whom you gave to be with me, she gave me fruit from the tree, and I ate." 13 Then the LORD God said to the woman, "What is this that you have done?" The woman said, "The serpent tricked me, and I ate."