Tree of knowledge of good and evil – Gen 2:9,17
This was one of the two trees in the garden at the creation of man. The fruit of this tree resulted in the death of your spirit, leaving man in a state where he has lost communication with God. It took the sacrifice of Jesus to reverse this curse.
The Old Testament, with the laws given by God, functioned under the principles of this tree. If you sin you must die. The practical implication of this is that our whole live is governed by rules of what is right and what is wrong.
The problem is that even those of us who accepted the salvation offered through Jesus, continue to operate on the principles of ‘right and wrong’ instead of relationship.
Jesus very clearly announced the end of a “right and wrong” approach when he introduced a personal relationship with the Father.
Rom 10:4 For Christ is the end of the law for righteousness to every one that believeth.
Mat 22:37 -40 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment. And the second is like unto it, Thou shalt love thy neighbor as thyself. On these two commandments hang all the law and the prophets.